Php preg_匹配有字符串大小限制
preg_match在PHP5.2.5上有str的限制Php preg_匹配有字符串大小限制,php,preg-match,Php,Preg Match,preg_match在PHP5.2.5上有str的限制 <?php $str1 = 'a@b%c@d' . str_repeat ('=', 33326); $str2 = 'a@b%c@d' . str_repeat ('=', 33327); $regexp = '/^(.*)@(.*)%(.*)$/si'; echo preg_match ($regexp, $str1) ? "Correct " : "Wrong "; // works corr
<?php
$str1 = 'a@b%c@d' . str_repeat ('=', 33326);
$str2 = 'a@b%c@d' . str_repeat ('=', 33327);
$regexp = '/^(.*)@(.*)%(.*)$/si';
echo preg_match ($regexp, $str1) ? "Correct " : "Wrong "; // works correctly
echo "\n";
echo preg_match ($regexp, $str2) ? "Correct " : "Wrong "; // exhibits the bug
echo "\n";
第二次调用后返回2(=PREG\u BACKTRACK\u LIMIT\u ERROR),因此您可能希望提高此值 这不是一个bug,这是一个特性:回溯限制已用尽!