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php 为什么 trim($str, '-') 无法删除 '-' ?

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Release: 2016-06-06 20:44:06
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如题,具体代码如下

<code><?php $trimmed = trim("go-go-go", '-');
    var_dump($trimmed);
?>
</code>
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输出为

<code>string(8) "go-go-go"
</code>
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请问为什么无法删除字符串中的 - 符号?第二个参数不是用来指定过滤符号的吗?

谢谢

回复内容:

如题,具体代码如下

<code><?php $trimmed = trim("go-go-go", '-');
    var_dump($trimmed);
?>
</code>
Copy after login
Copy after login

输出为

<code>string(8) "go-go-go"
</code>
Copy after login
Copy after login

请问为什么无法删除字符串中的 - 符号?第二个参数不是用来指定过滤符号的吗?

谢谢

trim() 只能删除 字符串 两侧的
可以使用楼上的方法 替换为空格

str_replace('','-','go-go-go');

替换用str_replace

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