PHP general detection function collection page 1/3_PHP tutorial

//[Warning]: Please do not modify without permission
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//
// [File name]: c_check.inc
// [Function]: Universal detection function set
// [Author]: Tian Hui
//
// [Last modification date]: 2001/05/11[cxx]
// [Variable definition rules]: 'C_' = character type ,'I_'=integer type,'N_'=numeric type,'L_'=Boolean type,'A_'=number
Group type
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// ※CheckMoney($C_Money) Checks whether the data is in
99999.99 format
// ※CheckEmailAddr($C_mailaddr) determines whether it is a valid email address
Address
// ※CheckWebAddr($C_weburl) determines whether it is a valid URL
// ※CheckEmpty($C_char) determines whether the string Is empty
// ※CheckLengthBetween($C_char, $I_len1, $I_len2=100) Determines whether it is within the specified length
String
// ※CheckUser($C_user) Determines whether it is a legal user name
// ※CheckPassword($C_passwd) determines whether it is a legitimate user password
code
// ※CheckTelephone($C_telephone) determines whether it is a legitimate phone number
code
// ※CheckValueBetween($ N_var, $N_val1, $N_val2) Determine whether it is within a certain range
Legal value
// ※CheckPost($C_post) Determine whether it is a legal zip code (fixed
fixed length)
// ※CheckExtendName($C_filename,$A_extend) Determine the extension of the uploaded file
// ※CheckImageSize($ImageFileName,$LimitSize) Check the size of the uploaded image
// ※AlertExit($C_alert,$I_goback=0) Illegal operation warning and exit
// ※Alert($C_alert,$I_goback=0) Illegal operation warning
// ※ReplaceSpacialChar($C_char) Special character replacement function
// ※ExchangeMoney($N_money) Fund conversion function
// ※WindowLocation($C_url,$C_get="",$C_getOther="") window.location in PHP
Function
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// Function name: CheckMoney($C_Money )
// Function: Check whether the data is in 99999.99 format
// Parameter: $C_Money (number to be detected)
// Return value: Boolean value
// Remarks: None
//--------------------------------------------- ---------------------------------------------
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function CheckMoney($C_Money)
{
if (!ereg("^[0-9][.][0-9]$", $C_Money)) return false;
return true;
}
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// Function name: CheckEmailAddr($C_mailaddr)
// Function: Determine whether it is a valid email address
// Parameter: $C_mailaddr (email address to be detected)
// Return value: Boolean value
// Remarks: None
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function CheckEmailAddr($C_mailaddr)
{
if (!eregi("^[_a-z0-9-]+( .[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*$",
$C_mailaddr))
// (!ereg("^[_a-zA-Z0-9-]+(.[_a-zA-Z0-9-]+)*@[_a-zA-Z0-9-]+(.[_a-zA -Z0-9-]+)*$",
$c_mailaddr))
{
return false;
}
return true;
}
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//----------------------------------------- ---------------------------------------------
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// Function name: CheckWebAddr($C_weburl)
// Function: Determine whether it is a valid URL
// Parameter: $C_weburl (URL to be detected)
// Return Value: Boolean
// Remarks: None
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function CheckWebAddr($C_weburl)
{
if (!ereg("^http://[_a-zA-Z0-9-]+( .[_a-zA-Z0-9-]+)*$", $C_weburl))
{
return false;
}
return true;
}
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//--------------------------------------------- -------------------------------------
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// Function name: CheckEmpty($C_char)
// Function: Determine whether the string is empty
// Parameter: $C_char (string to be detected)
// Return value: Boolean Value
// Remarks: None
//---------------------------------- ---------------------------------------------
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function CheckEmptyString($C_char)
{
if (!is_string($C_char)) return false; //Whether it is a string type
if (empty( $C_char)) return false; //Whether it has been set
if ($C_char=='') return false; //Whether it is empty
return true;
}
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//- -------------------------------------------------- --------------------------------
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// Function name: CheckLengthBetween($C_char, $I_len1, $I_len2=100)
// Function: Determine whether it is a string within the specified length
// Parameter: $C_char (string to be detected)
/ / $I_len1 (lower limit of target string length)
// $I_len2 (upper limit of target string length)
// Return value: Boolean value
// Remarks: None
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function CheckLengthBetween($ C_cahr, $I_len1, $I_len2=100)
{
$C_cahr = trim($C_cahr);
if (strlen($C_cahr) < $I_len1) return false;
if (strlen ($C_cahr) > $I_len2) return false;
return true;
}
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//---------------------- -------------------------------------------------- -----------
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// Function name: CheckUser($C_user)
// Function: Determine whether it is a legal user name
// Parameter: $C_user (user name to be detected)
// Return value: Boolean value
// Remarks: None
//---------- -------------------------------------------------- -----------------------
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function CheckUser($C_user)
{
if ( !CheckLengthBetween($C_user, 4, 20)) return false; //Width check
if (!ereg("^[_a-zA-Z0-9]*$", $C_user)) return false; // Special character check
return true;
}
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//--------------------------------- -------------------------------------------------- --
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// Function name: CheckPassword($C_passwd)
// Function: Determine whether it is a legal user password
// Parameter: $C_passwd ( Password to be detected)
// Return value: Boolean value
// Remarks: None
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function CheckPassword($C_passwd)
{
if (!CheckLengthBetween($C_passwd, 4, 20) ) return false; //Width detection
if (!ereg("^[_a-zA-Z0-9]*$", $C_passwd)) return false; //Special character detection
return true;
}
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