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PHP Operators: Execution Operator

PHP Operators Step By Step Tutorial - Part 9: PHP support one execution operator: backticks(` `), the sign of apostrophe inversed is non of single qoute. Execution operator is used to execute the content which exist in the clasp of backticks as a shell command (shell command) and the result is accomodated in one variable for then to present it at browser.

Operator of backticks is disable if the mode of safe mode is enable or the shell_exec () is disable. This execution operator is just for a while and only applied in the operation system of * nix (Unix and Linux) with Web Server Apache.

Pay attention to the example of using execute operator at script as following:

File name: backticks.php

<html>
<head>
<title>Using Execution Operator</title>
</head>

<body>
<h1>The example for using Execution Operator</h1>
<?
	$q = `ls - al`;
	echo "<pre>$q</pre>";
?>
</body>
</html>

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