How to remove spaces in the middle of a string in php?

php method to delete spaces in the middle of a string: 1. Use the regular method, the code is [echo preg_replace('# #', '', 'ab ab')]; 2. Use [str_replace()] Function method, the code is [echo str_replace(' ')].

php method to delete spaces in the middle of a string:

First: use regular expressions

The code is as follows:

Second type: Use str_replace() function

The code is as follows:

Third method: Use the strtr() function

The code is as follows:

'')); // 输出 "abab" ?>

strtr()The use of the function is a bit special, in essence:

The code is as follows:

 '2', 'w' => '1', 'b' => '3')) == str_replace(array('e', 'w', 'b'), array('2', '1', '3'), 'ewb'); ?>

Fourth method: Use encapsulation function

The code is as follows:

function trimall($str)//删除空格 { $qian=array(" ","　","\t","\n","\r"); $hou=array("","","","",""); return str_replace($qian,$hou,$str); }

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