94 lines
2.2 KiB
PHP
94 lines
2.2 KiB
PHP
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<?php
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/*
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* Functions which are only in some versions of PHP,
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* or only implemented on some platforms
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*/
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# (PHP 5 >= 5.2.1)
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# Based on http://www.phpit.net/
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# article/creating-zip-tar-archives-dynamically-php/2/
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if(!function_exists('sys_get_temp_dir')) {
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function sys_get_temp_dir() {
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// Try to get from environment variable
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if(!empty($_ENV['TMP'])) {
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return realpath($_ENV['TMP']);
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}
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else if(!empty($_ENV['TMPDIR'])) {
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return realpath($_ENV['TMPDIR']);
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}
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else if(!empty($_ENV['TEMP'])) {
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return realpath($_ENV['TEMP']);
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}
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// Detect by creating a temporary file
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else {
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// Try to use system's temporary directory
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// as random name shouldn't exist
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$temp_file = tempnam(md5(uniqid(rand(), TRUE)), '');
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if($temp_file) {
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$temp_dir = realpath(dirname($temp_file));
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unlink($temp_file);
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return $temp_dir;
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}
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else {
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return FALSE;
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}
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}
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}
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}
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# (PHP >= 5.1)
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# from http://www.php.net/inet_pton
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if(!function_exists('inet_pton')) {
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function inet_pton($ip) {
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# ipv4
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if(strpos($ip, '.') !== FALSE) {
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$ip = pack('N',ip2long($ip));
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}
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# ipv6
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else if(strpos($ip, ':') !== FALSE) {
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$ip = explode(':', $ip);
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$res = str_pad('', (4*(8-count($ip))), '0000', STR_PAD_LEFT);
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foreach($ip as $seg) {
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$res .= str_pad($seg, 4, '0', STR_PAD_LEFT);
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}
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$ip = pack('H'.strlen($res), $res);
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}
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return $ip;
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}
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}
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# (PHP >= 5.1)
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# from http://www.php.net/inet_ntop
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if(!function_exists('inet_ntop')) {
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function inet_ntop($ip) {
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if (strlen($ip)==4) {
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// ipv4
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list(,$ip)=unpack('N',$ip);
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$ip=long2ip($ip);
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} elseif(strlen($ip)==16) {
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// ipv6
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$ip=bin2hex($ip);
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$ip=substr(chunk_split($ip,4,':'),0,-1);
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$ip=explode(':',$ip);
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$res='';
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foreach($ip as $seg) {
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while($seg{0}=='0') $seg=substr($seg,1);
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if ($seg!='') {
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$res.=($res==''?'':':').$seg;
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} else {
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if (strpos($res,'::')===false) {
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if (substr($res,-1)==':') continue;
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$res.=':';
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continue;
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}
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$res.=($res==''?'':':').'0';
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}
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}
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$ip=$res;
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}
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return $ip;
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}
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}
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?>
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