php preg_match()问题？

php

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Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash in C:\Apache2.2\htdocs\php\preg.php on line 2

应该是正则表达式没有加左右侧的斜线吧，比如
$result = preg_match(‘/^abc/’, ‘abcdef’, $matches)

我猜测的话，你的正则不等式没有放在符号里面，一般应该这样’/…./’，你省略了里面的/就不对

如
<?php
$aa=”html/sell/2008/07/28/10.html”;
$xianshi = preg_replace(‘html\/(.+?)\/(.+?)\/(.+?)\/(.+?)\/(.+?)’,’info-$1-$2-$3-$4-$5′,$aa);
echo $xianshi;
?>

改为：

<?php
$aa=”html/sell/2008/07/28/10.html”;
$xianshi = preg_replace(‘/html\/(.+?)\/(.+?)\/(.+?)\/(.+?)\/(.+?)/’,’info-$1-$2-$3-$4-$5′,$aa);
echo $xianshi;
?>