Trim all white-space characters using PHP

function.trim_all.php

<?php
//
// source: http://pageconfig.com/post/remove-undesired-characters-with-trim_all-php
//

function trim_all( $str , $what = NULL , $with = ' ' )
{
	if( $what === NULL )
	{
		//	Character      Decimal      Use
		//	"\0"            0           Null Character
		//	"\t"            9           Tab
		//	"\n"           10           New line
		//	"\x0B"         11           Vertical Tab
		//	"\r"           13           New Line in Mac
		//	" "            32           Space
		
		$what	= "\\x00-\\x20";	//all white-spaces and control chars
	}
	
	return trim( preg_replace( "/[".$what."]+/" , $with , $str ) , $what );
}

?>