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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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