How to remove all spaces from string in php

php method to remove all spaces in a string: first trim can only remove spaces on both sides of the string; then expand the trim function, the code is [function trimall($str), $oldchar=array(" ", "　","\t","\n","\r")].

php method to remove all spaces in a string:

php removes all spaces in a string, actually Extension of the trim function, trim can only delete spaces on both sides of the string

The code is as follows:

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

Test:

$str = " a b c d e f ";
echo trimall($str);

Output result:

abcdef

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