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@ 2016-01-08T17:08:29Z

<?php
function setSessionTestingData()
	{
		$agent = 5;
		$ticket = 6;

		$_SESSION = array(
			'agent_id' => '2',
			'ticket_id' => '3',
			'agent' => $agent,
			'ticket' => $ticket,
			'sub_array' => array(
				'sub' => 4,
				'agent' => $agent,
				'ticket' => $ticket,
			),
		);

		return $_SESSION;
	}
	
	
	function getKey($session_key, $is_object_of_type = null)
    {
	    $current_key = '';
	    $counter = 0;

        try {
	        $session_keys_array = explode(':', $session_key);

	        //checking if keys and value exist
	        foreach ($session_keys_array as $key) {
		        $counter++;
		        $current_key .= '[\'' . $key . '\']';
		        if (!$_SESSION) {
			        throw new Exception("\$_SESSION does not Exist");
		        }
		        $prev_step = $_SESSION;

		        if (array_key_exists($key, $prev_step) && count($session_keys_array) > $counter) {
			        eval('$prevStep = $_SESSION' . $current_key . ';');
			        if (!is_array($prev_step) && count($session_keys_array) > $counter) {
				        throw new Exception ("\$_SESSION$current_key is not an array");
			        }
		        } else if (
			        is_array($prev_step) &&
			        eval('array_key_exists(\'' . $current_key . '\', $_SESSION);') &&
			        count($session_keys_array) == $counter
		        ) {
			        eval('$result = $_SESSION' . $current_key . ';');
		        } else {
			        throw new Exception("\$_SESSION$current_key does not Exist");
		        }
	        }

            //checking if value is of right type
            if (!empty($is_object_of_type) && !$result instanceof $is_object_of_type) {
                throw new Exception("\$_SESSION$current_key is not instance of $is_object_of_type");
            }

            //if we are here that means we have all safe data
        } catch(Exception $e) {
            //TODO:change Exception to SessionException and log this
            $result = null;
        }

        return $result;
    }
    
    $_SESSION = setSessionTestingData();
    
    echo getKey('agent_id');
    echo getKey('ticket_id');
    echo getKey('sub_array:sub');

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: Parse error: syntax error, unexpected identifier "agent_id", expecting ")" in /in/Y52pg(47) : eval()'d code on line 1
Process exited with code 255.
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Parse error: syntax error, unexpected identifier "agent_id", expecting ")" in /in/Y52pg(47) : eval()'d code on line 1
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: Parse error: syntax error, unexpected 'agent_id' (T_STRING), expecting ')' in /in/Y52pg(47) : eval()'d code on line 1
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33: Parse error: syntax error, unexpected 'agent_id' (T_STRING), expecting ',' or ')' in /in/Y52pg(47) : eval()'d code on line 1
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28: Parse error: syntax error, unexpected 'agent_id' (T_STRING) in /in/Y52pg(47) : eval()'d code on line 1 Parse error: syntax error, unexpected 'ticket_id' (T_STRING) in /in/Y52pg(47) : eval()'d code on line 1 Parse error: syntax error, unexpected 'sub_array' (T_STRING) in /in/Y52pg(47) : eval()'d code on line 1

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