php 将 ereg() 更改为 preg_match() 时对“分隔符不得为字母数字或反斜杠”错误进行故障排除
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Troubleshooting "Delimiter must not be alphanumeric or backslash" error when changing ereg() to preg_match()
提问by gordon33
Possible Duplicate:
Converting ereg expressions to preg
可能的重复：
将 ereg 表达式转换为 preg
<?php
$searchtag = "google";
$link = "http://images.google.com/images?hl=de&q=$searchtag&btnG=Bilder-Suche&gbv=1";
$code = file_get_contents($link,'r');
ereg("imgurl=http://www.[A-Za-z0-9-]*.[A-Za-z]*[^.]*.[A-Za-z]*", $code, $img);
ereg("http://(.*)", $img[0], $img_pic);
echo '<img src="'.$img_pic[0].'" width="70" height="70">'; ?>
And i get this error
我得到这个错误
Deprecated: Function ereg() is deprecated in C:\Program Files\EasyPHP-5.3.8.1\www\m\img.php on line 5
Deprecated: Function ereg() is deprecated in C:\Program Files\EasyPHP-5.3.8.1\www\m\img.php on line 6
已弃用：函数 ereg() 在 C:\Program Files\EasyPHP-5.3.8.1\www\m\img.php 中第 5 行已弃用
已弃用：函数 ereg() 在 C:\Program Files\EasyPHP-5.3.8.1\www\m\img.php 中第 6 行已弃用
preg_match() functions give this error
preg_match() 函数给出这个错误
Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash in C:\Program Files\EasyPHP-5.3.8.1\www\m\img.php on line 6
Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash in C:\Program Files\EasyPHP-5.3.8.1\www\m\img.php on line 7
警告：preg_match() [function.preg-match]：第 6 行 C:\Program Files\EasyPHP-5.3.8.1\www\m\img.php 中的分隔符不能是字母数字或反斜杠
警告：preg_match() [function.preg-match]：C:\Program Files\EasyPHP-5.3.8.1\www\m\img.php 第 7 行中的分隔符不能是字母数字或反斜杠
回答by cwallenpoole
eregis deprecated. Don't use it.- The
pregfunctions are all "Perl regular expressions" meaning you need to have some sort of beginning and end marker on your regex. Often this will be/or#, but any non alpha-numeric will do fine.
ereg已弃用。不要使用它。- 这些
preg函数都是“Perl 正则表达式”，这意味着您需要在正则表达式上有某种开始和结束标记。通常这将是/or#，但任何非字母数字都可以。
For example, these will work:
例如，这些将起作用：
preg_match("/foo/u",$needle,$haystack);
preg_match("#foo#i",$needle,$haystack);
preg_match("@foo@",$needle,$haystack);
preg_match("$foo$w",$needle,$haystack); // bad idea because `$` means something
// in regex but it is valid anyway
// also, they need to be escaped since
// I'm using " instead of '
But this will not:
但这不会：
preg_match("foo",$needle,$haystack); // no delimiter!
回答by Yes Barry
With preg_match()your regex must begin and end with a delimiter such as /with few exceptions (for example adding "i" at the end for case-insensative).
随着preg_match()你的正则表达式必须开始和结束分隔符，例如/除了少数例外（例如添加“我”末的情况下，insensative）。
e.g.
例如
preg_match('/[regex]/i', $string)
