用regex php替换所有的出现
问题描述：
I need to replace all the occurrence of the string World [*] : with 2000.
Output: 20002000hello
How can I achieve that?
I am currently using the below code but it is not working.
preg_replace("/World [(.*?)] : /", "2000", "World [23] : World[125] : hello",-1)
我需要将所有出现的字符串World [*]替换为2000.
输出： 20002000hello strong>
如何实现？
我目前正在使用以下代码，但它无法正常工作。 p>
preg_replace（“/ World [（。*？）]：/”，“2000”，“World [23]：World [125]：hello”， - 1）
code> pre>
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答
You can use:
$out = preg_replace('/World\s*\[.*?\] : /', "2000", "World [23] : World[125] : hello");
//=> 20002000hello
[ and ] are special regex meta characters that need to escaped and make space after World optional with 0 or more matches.
答
$str = "World [23] : World [125] : hello";
$str = preg_replace("/World (.*?) /", "2000", $str);
print $str;