[PHP] Collection of frequently used practical functions Page 1/2_PHP Tutorial

I recently planned to learn PHP, but I found that there are many functions that need to be used, but writing them by myself is troublesome, so I looked for common functions in PHP and got them from major PHP systems. They are definitely PHP utility functions

Copy code The code is as follows:

function GetIP() { //Get IP
if ($_SERVER["HTTP_X_FORWARDED_FOR"])
        $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
     else if ($_SERVER["HTTP_CLIENT_IP"])                                                           ($_SERVER[" REMOTE_ADDR"])
$ip = $_SERVER["REMOTE_ADDR"];
else if (getenv("HTTP_X_FORWARDED_FOR"))
$ip = getenv("HTTP_X_FORWARDED_FOR");
else if ( getenv("HTTP_CLIENT_IP"))
$ip = getenv("HTTP_CLIENT_IP");
else if (getenv("REMOTE_ADDR"))
$ip = getenv("REMOTE_ADDR");
else
$ip = "Unknown";
return $ip;
}

function DateAdd($date, $int, $unit = "d") { //Increase of time ( It can also be improved so that hours, minutes and seconds can be added, and you can add it when you have time)
$dateArr = explode("-", $date);
$value[$unit] = $int;
return date ("Y-m-d", mktime(0,0,0, $dateArr[1] + $value['m'], $dateArr[2] + $value['d'], $dateArr[0] + $value[ 'y']));
}

function GetWeekDay($date) { //Calculate the day of the week for the given date
$dateArr = explode("-", $date) ;
return date("w", mktime(0,0,0,$dateArr[1],$dateArr[2],$dateArr[0]));
}

Copy code The code is as follows:function check_date($date)

    if (is_numeric($dateArr[0]) && is_numeric($dateArr[1]) && is_numeric($dateArr[2])) {
        return checkdate($dateArr[1],$dateArr[2] ,$dateArr[0]);
    }
    return false;
}
function check_time($time) {  //手机时间下载设计时间
    $timeArr = explode(":", $time);
    if (is_numeric($timeArr[0]) && is_numeric($timeArr[1]) && is_numeric($timeArr[2])) {
        if (($timeArr[0] >= 0 && $ timeArr[0] <= 23) && ($timeArr[1] >= 0 && $timeArr[1] <= 59) && ($timeArr[2] >= 0 && $timeArr[2] < = 59))
            return true;
        else
            return false;
    }
    return false;
}

function DateDiff($date1, $date2, $unit = ")) { //时间时间电影，这个个日日相差几台、几小小小成>    switch ($unit) {
        case 's':
            $dividend = 1;
            break;
        case 'i':
            $dividend = 60;
            break;
        case 'h':
            $dividend = 3600;
            break;
        case 'd':
            $dividend = 86400;
            break;
        default:
            $dividend = 86400;
    }
    $time1 = strtotime($date1);
    $time2 = strtotime($date2);
    if ($time1 && $time2)
        return (float)($time1 - $time2) / $dividend;
    return false;
}

copy code

code below:

function get_innerhtml($html,$label) {   //获取一对html标记间的html字符串
    $result_arr = preg_split("//i",$html);
    $pattern = "/<".$label.".*?>/i";
    for ($i = 0; $i < count($result_arr); $i++) {
        list($left, $right) = preg_split($pattern,$result_arr[$i],2);
        $result_arr[$i] = $right;
    }
    return $result_arr;
}
//例: echo get_innerhtml("something", "td");   //will print "something".

function get_input_value($input) { //获取Input的HTML代码中的Value值
    $pos = stripos($input, "value=") + 6;
    if ($pos !== false) {
        $input = substr($input, $pos);
        if (substr($input, 0, 1) == """)
            return substr($input, 1, strpos($input, """, 1) - 1);
        else
            return substr($input, 0, strpos($input, " ") - 1);
    }
    return false;
}

function getcontentbetween($a, $b, $str) { //获取字符串$str中,字符串$a与字符串$b之间的字符串
    if ($str!=="" && $a!=="" && $b!=="") {
        $start = strpos($str, $a) + strlen($a);
        return substr($str, $start, strpos($str, $b, $start + 1) - $start);
    }
    return false;
}

1、关于PHP重定向

复制代码 代码如下:

方法一：header("Location: index.php"); 
方法二：echo "window.location ="$PHP_SELF";"; 
方法三：echo ""; 

2、获取访问者浏览器

复制代码 代码如下:

function browse_infor() 
{ 
$browser="";$browserver=""; 
$Browsers =array("Lynx","MOSAIC","AOL","Opera","JAVA","MacWeb","WebExplorer","OmniWeb"); 
$Agent = $GLOBALS["HTTP_USER_AGENT"]; 
for ($i=0; $i<=7; $i++) 
{ 
if (strpos($Agent,$Browsers[$i])) 
{ 
$browser = $Browsers[$i]; 
$browserver =""; 
} 
} 
if (ereg("Mozilla",$Agent) && !ereg("MSIE",$Agent)) 
{ 
$temp =explode("(", $Agent); $Part=$temp[0]; 
$temp =explode("/", $Part); $browserver=$temp[1]; 
$temp =explode(" ",$browserver); $browserver=$temp[0]; 
$browserver =preg_replace("/([d.]+)/","1",$browserver); 
$browserver = " $browserver"; 
$browser = "Netscape Navigator"; 
} 
if (ereg("Mozilla",$Agent) && ereg("Opera",$Agent)) 
{ 
$temp =explode("(", $Agent); $Part=$temp[1]; 
$temp =explode(")", $Part); $browserver=$temp[1]; 
$temp =explode(" ",$browserver);$browserver=$temp[2]; 
$browserver =preg_replace("/([d.]+)/","1",$browserver); 
$browserver = " $browserver"; 
$browser = "Opera"; 
} 
if (ereg("Mozilla",$Agent) && ereg("MSIE",$Agent)) 
{ 
$temp = explode("(", $Agent); $Part=$temp[1]; 
$temp = explode(";",$Part); $Part=$temp[1]; 
$temp = explode(" ",$Part);$browserver=$temp[2]; 
$browserver =preg_replace("/([d.]+)/","1",$browserver); 
$browserver = " $browserver"; 
$browser = "Internet Explorer"; 
} 
if ($browser!="") 
{ 
$browseinfo = "$browser$browserver"; 
} 
else 
{ 
$browseinfo = "Unknown"; 
} 
return $browseinfo; 
} 
//调用方法$browser=browseinfo() ;直接返回结果 

3、获取访问者操作系统

复制代码 代码如下:

function osinfo() { 
$os=""; 
$Agent = $GLOBALS["HTTP_USER_AGENT"]; 
if (eregi('win',$Agent) && strpos($Agent, '95')) { 
$os="Windows 95"; 
} 
elseif (eregi('win 9x',$Agent) && strpos($Agent, '4.90')) { 
$os="Windows ME"; 
} 
elseif (eregi('win',$Agent) && ereg('98',$Agent)) { 
$os="Windows 98"; 
} 
elseif (eregi('win',$Agent) && eregi('nt 5.0',$Agent)) { 
$os="Windows 2000"; 
} 
elseif (eregi('win',$Agent) && eregi('nt',$Agent)) { 
$os="Windows NT"; 
} 
elseif (eregi('win',$Agent) && eregi('nt 5.1',$Agent)) { 
$os="Windows XP"; 
} 
elseif (eregi('win',$Agent) && ereg('32',$Agent)) { 
$os="Windows 32"; 
} 
elseif (eregi('linux',$Agent)) { 
$os="Linux"; 
} 
elseif (eregi('unix',$Agent)) { 
$os="Unix"; 
} 
elseif (eregi('sun',$Agent) && eregi('os',$Agent)) { 
$os="SunOS"; 
} 
elseif (eregi('ibm',$Agent) && eregi('os',$Agent)) { 
$os="IBM OS/2"; 
} 
elseif (eregi('Mac',$Agent) && eregi('PC',$Agent)) { 
$os="Macintosh"; 
} 
elseif (eregi('PowerPC',$Agent)) { 
$os="PowerPC"; 
} 
elseif (eregi('AIX',$Agent)) { 
$os="AIX"; 
} 
elseif (eregi('HPUX',$Agent)) { 
$os="HPUX"; 
} 
elseif (eregi('NetBSD',$Agent)) { 
$os="NetBSD"; 
} 
elseif (eregi('BSD',$Agent)) { 
$os="BSD"; 
} 
elseif (ereg('OSF1',$Agent)) { 
$os="OSF1"; 
} 
elseif (ereg('IRIX',$Agent)) { 
$os="IRIX"; 
} 
elseif (eregi('FreeBSD',$Agent)) { 
$os="FreeBSD"; 
} 
if ($os=='') $os = "Unknown"; 
return $os; 
} 
//调用方法$os=os_infor() ; 

http://www.bkjia.com/PHPjc/318394.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/318394.htmlTechArticleI recently planned to learn PHP, but I found that there are many functions that need to be used, but it is troublesome to write them myself, so I looked for PHP. Commonly used functions, obtained from major PHP systems, are definitely PHP utility functions used...

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