Php trim space trim is invalid implement with str_replace

Source: Internet
Author: User
Tags rtrim trim

I usually think about spaces. I usually use trim. Today, I found that spaces in the middle cannot be removed. however, we can only find out the description. trim can only go to two ends, for example, $ abc = a B c;. trim can only remove spaces behind c in front of, but what should I do with spaces before and after B. str_replace is available.

The code is as follows: Copy code

Str_replace ('','', $ abc ).

Please be careful when spaces are needed. php does not use spaces. trim does not work. The str_replace line is complete. However, trim can delete the header space as follows:

Example

The code is as follows: Copy code

<? Php

Trim removes spaces at both ends of a string,
Rtrim removes the right space of a string,
Ltrim removes the left space of a string.

Echo trim ("space www.111cn.net"). "<br> ";
Echo rtrim ("space"). "<br> ";
Echo ltrim ("space"). "<br> ";
?>

The result is the same as that of str_replace.

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