php remove spaces from string

php method to remove spaces in a string: first create a PHP sample file; then delete all spaces in the specified string through the "str_replace(' ', '', ' a bab ');" method Can.

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Remove all spaces in the string

<?php
//删除所有空格
echo str_replace(&#39; &#39;, &#39;&#39;, &#39; a bab  &#39;);echo "\n";
echo preg_replace(&#39;/ /&#39;, &#39;&#39;, &#39;   ab  ab  &#39;);echo "\n";
echo strtr(&#39;    ab    ab    &#39;, array(&#39; &#39;=>&#39;&#39;));echo "\n";
function trimall($str)//删除所有的空格
{
    $qian=array(" ","　","\t","\n","\r");
    $hou=array("","","","","");
    return str_replace($qian,$hou,$str); 
}
echo trimall(" a  v  ");
echo "\n";
?>

The result is as shown:

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