How to replace spaces in php

How to replace spaces in php: You can use the preg_replace() function combined with the regular expression [/\s /] to replace spaces, such as [preg_replace('/\s /',' ',$contents) 】.

Function introduction:

preg_replace function performs a regular expression search and replacement.

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Example:

Replace all spaces with empty spaces

$contents="    abc           ";
$contents=preg_replace('/\s+/','',$contents);
//结果$contents="abc";

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