PHP: Get a line of input without echoing the typed characters to the screen

PHP Code
 function UI_Line_Quiet() {
		/*
		Purpose
			Used to get user input without echoing the typed characters to the screen.
		Return (string)
			Returns the entire string that the user typed.
			This function returns when the user presses the Enter key.
		Dependencies
			This function works only within the Bash shell.
		Version History
			1.0 2012.04.04  Tested by Russ Tanner on PHP 5.3.10.
		*/
	
		$Cmd = "/usr/bin/env bash -c 'read -s x && echo \$x'";
		return rtrim(shell_exec($Cmd));
	
	}

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