Warning: preg_replace(): Compilation failed: missing terminating ] for character class at offset 10 in
Warning: preg_replace(): Compilation failed: missing terminating ] for character class at offset 10 in
一、总结
1、[是正则中特殊字符，需要用\反斜杠转义
二、Warning: preg_replace(): Compilation failed: missing terminating ] for character class at offset 10 in
1、问题
I've got a series of .txt files that I'm reading in a for loop. And I've placed a token in some of the text files in the form [widget_]
So, the entire contents of the text file might be [widget_search] for example. And another text file might contain the content [widget_recent-posts]. Others might just have html formatted text and not have the token at all.
In the for loop, I'm doing a preg_match to see if the text file is one in which the contents matches my token pattern. And if a match, I'm executing some conditional code.
However, I'm getting an error when I run a trace test to see if there's a match.
The error is:
Warning: preg_match() [function.preg-match]: Compilation failed: missing terminating ] for character class at offset 8 in C:\xampplite\htdocs\test\wp-content\plugins\widget-test\widget-test.php on line 227
And here's the code at line 227:
if (preg_match("/[widget_/i",$widget_text)) {//do something}
2、解答
You should escape the [ character like this:
if (preg_match("/\[widget_/i",$widget_text)) {//do something}
3、相似错误
$start="/^<