search
HomeBackend DevelopmentPHP Tutorial 钱币换算 Currency conversion using php and Google calculator api

货币换算 Currency conversion using php and Google calculator api

?

Google is a wonderful ! While most of us use it for searching the web for information , few are aware that it has an inbuilt calculator which can also be used for converting a currency into another . Doing so is really simple , you just type ” AMOUNT CURRENCY_CONVERTING_FROM in CURRENCY_CONVERTING_TO ” and search , the inbuilt calculator will give you the result .For example , if one wants to convert 1 U.S Dollar into Euro , he shall type “1 USD in EUR” .

?

Now lets get to the topic of this post , Google also has a secret calculator API ( http://www.google.com/ig/calculator ) that is usually used for iGoogle gadgets , but since its free and open , anyone can use it .

?

So if you want to convert a currency into another using the API , your callback URL would look like :

?

?

?

www.google.com/ig/calculator?hl=en&q=AMOUNT-FROM_CURRENCY=?TO_CURRENCY
// 1 USD in EUR example
www.google.com/ig/calculator?hl=en&q=1USD=?EUR
?

?

?

In the above example , you get a string which looks like "{lhs: "1 U.S. dollar",rhs: "0.838574423 Euros",error: "",icc: true}" . You can easily explode() the string using php and extract the required data .

?

To make things easier for you , here is a simple php function that converts a currency into another using the Google calculator API . This example uses cURL , so you have to have it enabled for this code to work .

?

?

To make things easier for you , here is a simple php function that converts a currency into another using the Google calculator API . This example uses cURL , so you have to have it enabled for this code to work .

?

?

<?php
function currency($from_Currency,$to_Currency,$amount) {
	$amount = urlencode($amount);
	$from_Currency = urlencode($from_Currency);
	$to_Currency = urlencode($to_Currency);
	$url = "http://www.google.com/ig/calculator?hl=en&q=$amount$from_Currency=?$to_Currency";
	$ch = curl_init();
	$timeout = 0;
	curl_setopt ($ch, CURLOPT_URL, $url);
	curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($ch,  CURLOPT_USERAGENT , "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)");
	curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
	$rawdata = curl_exec($ch);
	curl_close($ch);
	$data = explode('"', $rawdata);
	$data = explode(' ', $data[3]);
	$var = $data[0];
	return round($var,3);
}

?>
?

?

?

The value returned by Google usually has 9 decimal places , you can round it off to a no. of digits after decimal of you choice using the round() function . By default the above function rounds the value to 3 digits after decimal .

?

Now here is how you can use the function in your scripts

?

?

?

<?php
//This will display current value of 1 USD in CNY ( China )
echo currency("USD","CNY",1);
?>
?

?

?

Hope this has helped you with converting currencies using php on your website

?

?

?

来源:?http://www.xe.com/ucc/full/?obsolete=yes

?

附:货币

?

<select name="From" size="10" tabindex="2">
	<option selected="selected" value="AFN">Afghanistan, Afghani (AFN)</option>
	<option value="ALL">Albania, Lek (ALL)</option>
	<option value="DZD">Algeria, Dinar (DZD)</option>
	<option value="USD">America (United States), Dollar (USD)</option>
	<option value="USD">American Samoa, United States Dollar (USD)</option>
	<option value="EUR">Andorra, Euro (EUR)</option>
	<option value="AOA">Angola, Kwanza (AOA)</option>
	<option value="XCD">Anguilla, East Caribbean Dollar (XCD)</option>
	<option value="XCD">Antigua and Barbuda, East Caribbean Dollar (XCD)</option>
	<option value="ARS">Argentina, Peso (ARS)</option>
	<option value="AMD">Armenia, Dram (AMD)</option>
	<option value="AWG">Aruba, Guilder (AWG)</option>
	<option value="AUD">Ashmore and Cartier Islands, Australia Dollar (AUD)</option>
	<option value="AUD">Australia, Dollar (AUD)</option>
	<option value="EUR">Austria, Euro (EUR)</option>
	<option value="ATS">Austria, Schilling [obsolete] (ATS)</option>        
	<option value="AZM">Azerbaijan, Manat [obsolete] (AZM)</option>
	<option value="AZN">Azerbaijan, New Manat (AZN)</option>
	<option value="EUR">Azores, Euro (EUR)</option>
	<option value="BSD">Bahamas, Dollar (BSD)</option>
	<option value="BHD">Bahrain, Dinar (BHD)</option>
	<option value="BBD">Bajan (Barbados), Dollar (BBD)</option>
	<option value="EUR">Balearic Islands, Euro (EUR)</option>
	<option value="BDT">Bangladesh, Taka (BDT)</option>
	<option value="BBD">Barbados, Dollar (BBD)</option>
	<option value="BYR">Belarus, Ruble (BYR)</option>
	<option value="EUR">Belgium, Euro (EUR)</option>
	<option value="BEF">Belgium, Franc [obsolete] (BEF)</option>
	<option value="BZD">Belize, Dollar (BZD)</option>
	<option value="XOF">Benin, CFA Franc BCEAO (XOF)</option>
	<option value="BMD">Bermuda, Dollar (BMD)</option>
	<option value="INR">Bhutan, India Rupee (INR)</option>
	<option value="BTN">Bhutan, Ngultrum (BTN)</option>
	<option value="BOB">Bolivia, Boliviano (BOB)</option>
	<option value="ANG">Bonaire, Netherlands Antilles Guilder (ANG)</option>
	<option value="BAM">Bosnia and Herzegovina, Convertible Marka (BAM)</option>
	<option value="BWP">Botswana, Pula (BWP)</option>
	<option value="BRL">Brazil, Real (BRL)</option>
	<option value="GBP">Britain (United Kingdom), Pound (GBP)</option>
	<option value="GBP">British Indian Ocean Territory, United Kingdom Pound (GBP)</option>
	<option value="USD">British Indian Ocean Territory, United States Dollar (USD)</option>
	<option value="USD">British Virgin Islands, United States Dollar (USD)</option>
	<option value="BND">Brunei, Dollar (BND)</option>
	<option value="SGD">Brunei, Singapore Dollar (SGD)</option>
	<option value="BGN">Bulgaria, Lev (BGN)</option>
	<option value="XOF">Burkina Faso, CFA Franc BCEAO (XOF)</option>
	<option value="MMK">Burma (Myanmar), Kyat (MMK)</option>
	<option value="BIF">Burundi, Franc (BIF)</option>
	<option value="KHR">Cambodia, Riel (KHR)</option>
	<option value="XAF">Cameroon, CFA Franc BEAC (XAF)</option>
	<option value="CAD">Canada, Dollar (CAD)</option>
	<option value="EUR">Canary Islands, Euro (EUR)</option>
	<option value="CVE">Cape Verde, Escudo (CVE)</option>
	<option value="KYD">Cayman Islands, Dollar (KYD)</option>
	<option value="XAF">Central African Republic, CFA Franc BEAC (XAF)</option>
	<option value="XAF">CFA Communauté Financière Africaine BEAC Franc (XAF)</option>
	<option value="XOF">CFA Communauté Financière Africaine BCEAO Franc (XOF)</option>
	<option value="XAF">Chad, CFA Franc BEAC (XAF)</option>
	<option value="CLP">Chile, Peso (CLP)</option>
	<option value="CNY">China, Yuan Renminbi (CNY)</option>
	<option value="AUD">Christmas Island, Australia Dollar (AUD)</option>
	<option value="AUD">Cocos (Keeling Islands, Australia Dollar (AUD)</option>
	<option value="COP">Colombia, Peso (COP)</option>
	<option value="XAF">Communauté Financière Africaine BEAC Franc (XAF)</option>
	<option value="XOF">Communauté Financière Africaine BCEAO Franc (XOF)</option>
	<option value="KMF">Comoros, Franc (KMF)</option>
	<option value="XPF">Comptoirs Fran?ais du Pacifique Franc (XPF)</option>
	<option value="XAF">Congo/Brazzaville, CFA Franc BEAC (XAF)</option>
	<option value="CDF">Congo/Kinshasa, Franc (CDF)</option>
	<option value="NZD">Cook Islands, New Zealand Dollar (NZD)</option>
	<option value="AUD">Coral Sea Islands, Australia Dollar (AUD)</option>
	<option value="CRC">Costa Rica, Colon (CRC)</option>
	<option value="XOF">C?te d'Ivoire, CFA Franc BCEAO (XOF)</option>
	<option value="HRK">Croatia, Kuna (HRK)</option>
	<option value="CUC">Cuba, Convertible Peso (CUC)</option>
	<option value="CUP">Cuba, Peso (CUP)</option>
	<option value="ANG">Cura?o, Netherlands Antilles Guilder (ANG)</option>
	<option value="EUR">Cyprus, Euro (EUR)</option>
	<option value="CYP">Cyprus, Pound [obsolete] (CYP)</option>
	<option value="CZK">Czech Republic, Koruna (CZK)</option>
	<option value="DKK">Denmark, Krone (DKK)</option>
	<option value="DJF">Djibouti, Franc (DJF)</option>
	<option value="XCD">Dominica, East Caribbean Dollar (XCD)</option>
	<option value="DOP">Dominican Republic, Peso (DOP)</option>
	<option value="EUR">Dutch (Netherlands), Euro (EUR)</option>
	<option value="NLG">Dutch (Netherlands), Guilder [obsolete] (NLG)</option>
	<option value="XCD">East Caribbean Dollar (XCD)</option>
	<option value="USD">East Timor, United States Dollar (USD)</option>
	<option value="USD">Ecuador, United States Dollar (USD)</option>
	<option value="EGP">Egypt, Pound (EGP)</option>
	<option value="SVC">El Salvador, Colon (SVC)</option>
	<option value="USD">El Salvador, United States Dollar (USD)</option>
	<option value="GBP">England (United Kingdom), Pound (GBP)</option>
	<option value="XAF">Equatorial Guinea, CFA Franc BEAC (XAF)</option>
	<option value="ERN">Eritrea, Nakfa (ERN)</option>
	<option value="EUR">Estonia, Euro (EUR)</option>
	<option value="EEK">Estonia, Kroon [obsolete] (EEK)</option>
	<option value="ETB">Ethiopia, Birr (ETB)</option>
	<option value="EUR">Euro (EUR)</option>
	<option value="EUR">Europa Island, Euro (EUR)</option>
	<option value="FKP">Falkland Islands, Pound (FKP)</option>
	<option value="DKK">Faroe Islands, Denmark Krone (DKK)</option>
	<option value="FJD">Fiji, Dollar (FJD)</option>
	<option value="EUR">Finland, Euro (EUR)</option>
	<option value="FIM">Finland, Markka [obsolete] (FIM)</option>
	<option value="EUR">France, Euro (EUR)</option>
	<option value="FRF">France, Franc [obsolete] (FRF)</option>
	<option value="EUR">French Guiana, Euro (EUR)</option>
	<option value="XPF">French Polynesia, Comptoirs Fran?ais du Pacifique Franc (XPF)</option>
	<option value="EUR">French Southern and Antarctic Lands, Euro (EUR)</option>
	<option value="XAF">Gabon, CFA Franc BEAC (XAF)</option>
	<option value="GMD">Gambia, Dalasi (GMD)</option>
	<option value="ILS">Gaza Strip, Israel New Shekel (ILS)</option>
	<option value="GEL">Georgia, Lari (GEL)</option>
	<option value="DEM">Germany, Deutsche Mark [obsolete] (DEM)</option>
	<option value="EUR">Germany, Euro (EUR)</option>
	<option value="GHC">Ghana, Cedi [obsolete] (GHC)</option>
	<option value="GHS">Ghana, Cedi (GHS)</option>
	<option value="GIP">Gibraltar, Pound (GIP)</option>
	<option value="XAU">Gold Ounce (XAU)</option>
	<option value="GBP">Great Britain (United Kingdom), Pound (GBP)</option>
	<option value="EUR">Greece, Euro (EUR)</option>
	<option value="GRD">Greece, Drachma [obsolete] (GRD)</option>                         
	<option value="DKK">Greenland, Denmark Krone (DKK)</option>
	<option value="XCD">Grenada, East Caribbean Dollar (XCD)</option>
	<option value="EUR">Guadeloupe, Euro (EUR)</option>
	<option value="USD">Guam, United States Dollar (USD)</option>
	<option value="GTQ">Guatemala, Quetzal (GTQ)</option>
	<option value="GGP">Guernsey, Pound (GGP)</option>
	<option value="GNF">Guinea, Franc (GNF)</option>
	<option value="XOF">Guinea-Bissau, CFA Franc BCEAO (XOF)</option>
	<option value="GYD">Guyana, Dollar (GYD)</option>
	<option value="HTG">Haiti, Gourde (HTG)</option>
	<option value="EUR">Holland (Netherlands), Euro (EUR)</option>
	<option value="NLG">Holland (Netherlands), Guilder [obsolete] (NLG)</option>
	<option value="EUR">Holy See (Vatican City), Euro (EUR)</option>
	<option value="VAL">Holy See (Vatican City), Lira [obsolete] (VAL)</option>
	<option value="HNL">Honduras, Lempira (HNL)</option>
	<option value="HKD">Hong Kong, Dollar (HKD)</option>
	<option value="HUF">Hungary, Forint (HUF)</option>
	<option value="ISK">Iceland, Krona (ISK)</option>
	<option value="INR">India, Rupee (INR)</option>
	<option value="IDR">Indonesia, Rupiah (IDR)</option>
	<option value="XDR">International Monetary Fund Special Drawing Right (XDR)</option>
	<option value="IRR">Iran, Rial (IRR)</option>
	<option value="IQD">Iraq, Dinar (IQD)</option>
	<option value="EUR">Ireland, Euro (EUR)</option>
	<option value="IEP">Ireland, Pound [obsolete] (IEP)</option>
	<option value="FKP">Islas Malvinas (Falkland Islands), Pound (FKP)</option>
	<option value="IMP">Isle of Man, Pound (IMP)</option>
	<option value="ILS">Israel, New Shekel (ILS)</option>
	<option value="EUR">Italy, Euro (EUR)</option>
	<option value="ITL">Italy, Lira [obsolete] (ITL)</option>
	<option value="XOF">Ivory Coast (C?te d'Ivoire), CFA Franc BCEAO (XOF)</option>
	<option value="JMD">Jamaica, Dollar (JMD)</option>
	<option value="JPY">Japan, Yen (JPY)</option>
	<option value="JEP">Jersey, Pound (JEP)</option>
	<option value="USD">Johnson, United States Dollar (USD)</option>
	<option value="JOD">Jordan, Dinar (JOD)</option>
	<option value="EUR">Juan de Nova, Euro (EUR)</option>
	<option value="KZT">Kazakhstan, Tenge (KZT)</option>
	<option value="KES">Kenya, Shilling (KES)</option>
	<option value="AUD">Kiribati, Australia Dollar (AUD)</option>
	<option value="KWD">Kuwait, Dinar (KWD)</option>
	<option value="KGS">Kyrgyzstan, Som (KGS)</option>
	<option value="LAK">Laos, Kip (LAK)</option>
	<option value="LVL">Latvia, Lat (LVL)</option>
	<option value="LBP">Lebanon, Pound (LBP)</option>
	<option value="LSL">Lesotho, Loti (LSL)</option>
	<option value="LRD">Liberia, Dollar (LRD)</option>
	<option value="LYD">Libya, Dinar (LYD)</option>
	<option value="CHF">Liechtenstein, Switzerland Franc (CHF)</option>
	<option value="LTL">Lithuania, Litas (LTL)</option>
	<option value="EUR">Luxembourg, Euro (EUR)</option>
	<option value="LUF">Luxembourg, Franc [obsolete] (LUF)</option>
	<option value="MOP">Macau, Pataca (MOP)</option>
	<option value="MKD">Macedonia, Denar (MKD)</option>
	<option value="MGA">Madagascar, Ariary (MGA)</option>
	<option value="MGF">Madagascar, Franc [obsolete] (MGF)</option>
	<option value="EUR">Madeira Islands, Euro (EUR)</option>
	<option value="MWK">Malawi, Kwacha (MWK)</option>
	<option value="MYR">Malaysia, Ringgit (MYR)</option>
	<option value="MVR">Maldives, Rufiyaa (MVR)</option>
	<option value="XOF">Mali, CFA Franc BCEAO (XOF)</option>
	<option value="EUR">Malta, Euro (EUR)</option>
	<option value="MTL">Malta, Lira [obsolete] (MTL)</option>
	<option value="FKP">Malvinas (Falkland Islands), Pound (FKP)</option>
	<option value="USD">Marshall Islands, United States Dollar (USD)</option>
	<option value="EUR">Martinique, Euro (EUR)</option>
	<option value="MRO">Mauritania, Ouguiya (MRO)</option>
	<option value="MUR">Mauritius, Rupee (MUR)</option>
	<option value="EUR">Mayotte, Euro (EUR)</option>
	<option value="MXN">Mexico, Peso (MXN)</option>
	<option value="USD">Micronesia, United States Dollar (USD)</option>
	<option value="USD">Midway Islands, United States Dollar (USD)</option>
	<option value="MDL">Moldova, Leu (MDL)</option>
	<option value="EUR">Monaco, Euro (EUR)</option>
	<option value="MNT">Mongolia, Tughrik (MNT)</option>
	<option value="EUR">Montenegro, Euro (EUR)</option>
	<option value="XCD">Montserrat, East Caribbean Dollar (XCD)</option>
	<option value="MAD">Morocco, Dirham (MAD)</option>
	<option value="MZN">Mozambique, Metical (MZN)</option>
	<option value="MZM">Mozambique, Metical [obsolete] (MZM)</option>
	<option value="MMK">Myanmar (Burma), Kyat (MMK)</option>
	<option value="NAD">Namibia, Dollar (NAD)</option>
	<option value="AUD">Nauru, Australia Dollar (AUD)</option>
	<option value="HTG">Navassa, Haiti Gourde (HTG)</option>
	<option value="USD">Navassa, United States Dollar (USD)</option>
	<option value="NPR">Nepal, Rupee (NPR)</option>
	<option value="ANG">Netherlands Antilles, Guilder (ANG)</option>
	<option value="EUR">Netherlands, Euro (EUR)</option>
	<option value="NLG">Netherlands, Guilder [obsolete] (NLG)</option>
	<option value="XPF">New Caledonia, Comptoirs Fran?ais du Pacifique Franc (XPF)</option>
	<option value="NZD">New Zealand, Dollar (NZD)</option>
	<option value="NIO">Nicaragua, Cordoba (NIO)</option>
	<option value="XOF">Niger, CFA Franc BCEAO (XOF)</option>
	<option value="NGN">Nigeria, Naira (NGN)</option>
	<option value="NZD">Niue, New Zealand Dollar (NZD)</option>
	<option value="AUD">Norfolk Island, Australia Dollar (AUD)</option>
	<option value="KPW">North Korea, Won (KPW)</option>
	<option value="USD">Northern Mariana Islands, United States Dollar (USD)</option>
	<option value="NOK">Norway, Krone (NOK)</option>
	<option value="OMR">Oman, Rial (OMR)</option>
	<option value="PKR">Pakistan, Rupee (PKR)</option>
	<option value="USD">Palau, United States Dollar (USD)</option>
	<option value="XPD">Palladium Ounce (XPD)</option>
	<option value="PAB">Panama, Balboa (PAB)</option>
	<option value="USD">Panama, United States Dollar (USD)</option>
	<option value="PGK">Papua New Guinea, Kina (PGK)</option>
	<option value="CNY">Paracel Islands, China Yuan Renminbi (CNY)</option>
	<option value="VND">Paracel Islands, Vietnam Dong (VND)</option>
	<option value="PYG">Paraguay, Guarani (PYG)</option>
	<option value="PEN">Peru, Nuevo Sol (PEN)</option>
	<option value="PHP">Philippines, Peso (PHP)</option>
	<option value="NZD">Pitcairn, New Zealand Dollar (NZD)</option>
	<option value="XPT">Platinum Ounce (XPT)</option>
	<option value="PLN">Poland, Zloty (PLN)</option>
	<option value="EUR">Portugal, Euro (EUR)</option>
	<option value="PTE">Portugal, Escudo [obsolete] (PTE)</option>
	<option value="USD">Puerto Rico, United States Dollar (USD)</option>
	<option value="QAR">Qatar, Riyal (QAR)</option>
	<option value="EUR">Réunion, Euro (EUR)</option>
	<option value="RON">Romania, New Leu (RON)</option>
	<option value="ROL">Romania, Leu [obsolete] (ROL)</option>
	<option value="RUB">Russia, Ruble (RUB)</option>
	<option value="RWF">Rwanda, Franc (RWF)</option>
	<option value="ANG">Saba, Netherlands Antilles Guilder (ANG)</option>
	<option value="SHP">Saint Helena, Pound (SHP)</option>
	<option value="XCD">Saint Kitts and Nevis, East Caribbean Dollar (XCD)</option>
	<option value="XCD">Saint Lucia, East Caribbean Dollar (XCD)</option>
	<option value="EUR">Saint Pierre and Miquelon, Euro (EUR)</option>
	<option value="XCD">Saint Vincent and The Grenadines, East Caribbean Dollar (XCD)</option>
	<option value="EUR">Saint-Martin, Euro (EUR)</option>
	<option value="WST">Samoa, Tala (WST)</option>
	<option value="EUR">San Marino, Euro (EUR)</option>
	<option value="STD">S?o Tome and Principe, Dobra (STD)</option>
	<option value="SAR">Saudi Arabia, Riyal (SAR)</option>
	<option value="GBP">Scotland (United Kingdom), Pound (GBP)</option>
	<option value="SPL">Seborga, Luigino (SPL)</option>
	<option value="XOF">Senegal, CFA Franc BCEAO (XOF)</option>
	<option value="RSD">Serbia, Dinar (RSD)</option>
	<option value="SCR">Seychelles, Rupee (SCR)</option>
	<option value="SLL">Sierra Leone, Leone (SLL)</option>
	<option value="XAG">Silver Ounce (XAG)</option>
	<option value="SGD">Singapore, Dollar (SGD)</option>
	<option value="ANG">Sint Eustatius, Netherlands Antilles Guilder (ANG)</option>
	<option value="ANG">Sint Maarten, Netherlands Antilles Guilder (ANG)</option>
	<option value="EUR">Slovakia, Euro (EUR)</option>
	<option value="SKK">Slovakia, Koruna [obsolete] (SKK)</option>
	<option value="EUR">Slovenia, Euro (EUR)</option>
	<option value="SIT">Slovenia, Tolar [obsolete] (SIT)</option>
	<option value="SBD">Solomon Islands, Dollar (SBD)</option>
	<option value="SOS">Somalia, Shilling (SOS)</option>
	<option value="ZAR">South Africa, Rand (ZAR)</option>
	<option value="GBP">South Georgia, United Kingdom Pound (GBP)</option>
	<option value="KRW">South Korea, Won (KRW)</option>
	<option value="GBP">South Sandwich Islands, United Kingdom Pound (GBP)</option>
	<option value="EUR">Spain, Euro (EUR)</option>
	<option value="ESP">Spain, Peseta [obsolete] (ESP)</option>
	<option value="LKR">Sri Lanka, Rupee (LKR)</option>
	<option value="SDD">Sudan, Dinar [obsolete] (SDD)</option>
	<option value="SDG">Sudan, Pound (SDG)</option>
	<option value="SRD">Suriname, Dollar (SRD)</option>
	<option value="SRG">Suriname, Guilder (SRG) [obsolete]</option>
	<option value="NOK">Svalbard and Jan Mayen, Norway Krone (NOK)</option>
	<option value="SZL">Swaziland, Lilangeni (SZL)</option>
	<option value="ZAR">Swaziland, South Africa Rand (ZAR)</option>
	<option value="SEK">Sweden, Krona (SEK)</option>
	<option value="CHF">Switzerland, Franc (CHF)</option>
	<option value="SYP">Syria, Pound (SYP)</option>
	<option value="TWD">Taiwan, New Dollar (TWD)</option>
	<option value="TJS">Tajikistan, Somoni (TJS)</option>
	<option value="RUB">Tajikistan, Russia Ruble (RUB)</option>
	<option value="TZS">Tanzania, Shilling (TZS)</option>
	<option value="THB">Thailand, Baht (THB)</option>
	<option value="XOF">Togo, CFA Franc BCEAO (XOF)</option>
	<option value="NZD">Tokelau, New Zealand Dollar (NZD)</option>
	<option value="TOP">Tonga, Pa'anga (TOP)</option>
	<option value="MDL">Transnistria, Moldova Leu (MDL)</option>
	<option value="TTD">Trinidad and Tobago, Dollar (TTD)</option>
	<option value="TND">Tunisia, Dinar (TND)</option>
	<option value="TRY">Turkey, Lira (TRY)</option>
	<option value="TRL">Turkey, Lira (TRL) [obsolete]</option>
	<option value="TMT">Turkmenistan, New Manat (TMT)</option>
	<option value="TMM">Turkmenistan, Manat (TMM)</option>
	<option value="USD">Turks and Caicos Islands, United States Dollar (USD)</option>
	<option value="AUD">Tuvalu, Australia Dollar (AUD)</option>
	<option value="TVD">Tuvalu, Dollar (TVD)</option>
	<option value="UGX">Uganda, Shilling (UGX)</option>
	<option value="UAH">Ukraine, Hryvna (UAH)</option>
	<option value="AED">United Arab Emirates, Dirham (AED)</option>
	<option value="GBP">United Kingdom, Pound (GBP)</option>
	<option value="USD">United States, Dollar (USD)</option>
	<option value="UYU">Uruguay, Peso (UYU)</option>
	<option value="UZS">Uzbekistan, Som (UZS)</option>
	<option value="VUV">Vanuatu, Vatu (VUV)</option>
	<option value="EUR">Vatican City, Euro (EUR)</option>
	<option value="VAL">Vatican City, Lira [obsolete] (VAL)</option>
	<option value="VEF">Venezuela, Bolivar Fuerte (VEF)</option>
	<option value="VEB">Venezuela, Bolivar (VEB) [obsolete]</option>
	<option value="VND">Vietnam, Dong (VND)</option>
	<option value="USD">Virgin Islands, United States Dollar (USD)</option>
	<option value="USD">Wake Island, United States Dollar (USD)</option>
	<option value="XPF">Wallis and Futuna Islands, Comptoirs Fran?ais du Pacifique Franc (XPF)</option>
	<option value="ILS">West Bank, Israel New Shekel (ILS)</option>
	<option value="JOD">West Bank, Jordan Dinar (JOD)</option>
	<option value="MAD">Western Sahara, Morocco Dirham (MAD)</option>
	<option value="WST">Samoa, Tala (WST)</option>
	<option value="YER">Yemen, Rial (YER)</option>
	<option value="ZMK">Zambia, Kwacha (ZMK)</option>
	<option value="ZWD">Zimbabwe, Dollar (ZWD)</option>
</select>
?

?

?

?

?

?

?

?

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
How can you check if a PHP session has already started?How can you check if a PHP session has already started?Apr 30, 2025 am 12:20 AM

In PHP, you can use session_status() or session_id() to check whether the session has started. 1) Use the session_status() function. If PHP_SESSION_ACTIVE is returned, the session has been started. 2) Use the session_id() function, if a non-empty string is returned, the session has been started. Both methods can effectively check the session state, and choosing which method to use depends on the PHP version and personal preferences.

Describe a scenario where using sessions is essential in a web application.Describe a scenario where using sessions is essential in a web application.Apr 30, 2025 am 12:16 AM

Sessionsarevitalinwebapplications,especiallyfore-commerceplatforms.Theymaintainuserdataacrossrequests,crucialforshoppingcarts,authentication,andpersonalization.InFlask,sessionscanbeimplementedusingsimplecodetomanageuserloginsanddatapersistence.

How can you manage concurrent session access in PHP?How can you manage concurrent session access in PHP?Apr 30, 2025 am 12:11 AM

Managing concurrent session access in PHP can be done by the following methods: 1. Use the database to store session data, 2. Use Redis or Memcached, 3. Implement a session locking strategy. These methods help ensure data consistency and improve concurrency performance.

What are the limitations of using PHP sessions?What are the limitations of using PHP sessions?Apr 30, 2025 am 12:04 AM

PHPsessionshaveseverallimitations:1)Storageconstraintscanleadtoperformanceissues;2)Securityvulnerabilitieslikesessionfixationattacksexist;3)Scalabilityischallengingduetoserver-specificstorage;4)Sessionexpirationmanagementcanbeproblematic;5)Datapersis

Explain how load balancing affects session management and how to address it.Explain how load balancing affects session management and how to address it.Apr 29, 2025 am 12:42 AM

Load balancing affects session management, but can be resolved with session replication, session stickiness, and centralized session storage. 1. Session Replication Copy session data between servers. 2. Session stickiness directs user requests to the same server. 3. Centralized session storage uses independent servers such as Redis to store session data to ensure data sharing.

Explain the concept of session locking.Explain the concept of session locking.Apr 29, 2025 am 12:39 AM

Sessionlockingisatechniqueusedtoensureauser'ssessionremainsexclusivetooneuseratatime.Itiscrucialforpreventingdatacorruptionandsecuritybreachesinmulti-userapplications.Sessionlockingisimplementedusingserver-sidelockingmechanisms,suchasReentrantLockinJ

Are there any alternatives to PHP sessions?Are there any alternatives to PHP sessions?Apr 29, 2025 am 12:36 AM

Alternatives to PHP sessions include Cookies, Token-based Authentication, Database-based Sessions, and Redis/Memcached. 1.Cookies manage sessions by storing data on the client, which is simple but low in security. 2.Token-based Authentication uses tokens to verify users, which is highly secure but requires additional logic. 3.Database-basedSessions stores data in the database, which has good scalability but may affect performance. 4. Redis/Memcached uses distributed cache to improve performance and scalability, but requires additional matching

Define the term 'session hijacking' in the context of PHP.Define the term 'session hijacking' in the context of PHP.Apr 29, 2025 am 12:33 AM

Sessionhijacking refers to an attacker impersonating a user by obtaining the user's sessionID. Prevention methods include: 1) encrypting communication using HTTPS; 2) verifying the source of the sessionID; 3) using a secure sessionID generation algorithm; 4) regularly updating the sessionID.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.