Online PHP editor | output for 2Xacb

@ 2015-04-24T00:44:03Z

<?php
error_reporting(-1);
ini_set('display_errors', 1);

class system_tags {
	function __call($name, $params) {
		return '(METHOD "' . $name . '" WAS CALLED WITH PARAMS ' . implode(', ', $params) . ')';
	}
}

class App {
	function run() {
		// Prerequisites.
		$system_tags = new system_tags();
		
		$core = new \stdClass();
		$core->tags = array(
			'hello' => 'tagHelloMethod(1, 2)',
			'world' => 'tagWorldMethod(3, 4)',
		);
		
		// Approach 1.
		$this->template = 'Blah blah {hello} blah blah {world}.';
		$this->withStrReplace($core, $system_tags);
		echo $this->template . "\n";
		
		// Approach 2.
		$this->template = 'Blah blah {hello} blah blah {world}.';
		$this->withRegexReplaceCallback($core, $system_tags);
		echo $this->template . "\n";
	}
	
	function withStrReplace($core, $system_tags) {
	    
		foreach($core->tags as $tag_name => $tag_method) {
			$this->template = str_replace(
				'{' . $tag_name . '}', 
				eval('return $system_tags->' . $tag_method . ';'), 
				$this->template
			);
		}
		
	}
		
	function withRegexReplaceCallback($core, $system_tags) {
	    
		$callback = static function ($matches) use (& $tag_method, $system_tags) {
			return eval('return $system_tags->' . $tag_method . ';');
		};
		
		foreach($core->tags as $tag_name => $tag_method) {
			$this->template = preg_replace_callback(
				'/\{' . preg_quote($tag_name) . '\}/', 
				$callback, 
				$this->template
			);
		}
		
	}
}

$app = new App();
$app->run();

Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Deprecated: Creation of dynamic property App::$template is deprecated in /in/2Xacb on line 23 Blah blah (METHOD "tagHelloMethod" WAS CALLED WITH PARAMS 1, 2) blah blah (METHOD "tagWorldMethod" WAS CALLED WITH PARAMS 3, 4). Blah blah (METHOD "tagHelloMethod" WAS CALLED WITH PARAMS 1, 2) blah blah (METHOD "tagWorldMethod" WAS CALLED WITH PARAMS 3, 4).
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28: Blah blah (METHOD "tagHelloMethod" WAS CALLED WITH PARAMS 1, 2) blah blah (METHOD "tagWorldMethod" WAS CALLED WITH PARAMS 3, 4). Blah blah (METHOD "tagHelloMethod" WAS CALLED WITH PARAMS 1, 2) blah blah (METHOD "tagWorldMethod" WAS CALLED WITH PARAMS 3, 4).
Output for 5.3.0 - 5.3.29: Parse error: syntax error, unexpected T_FUNCTION, expecting T_PAAMAYIM_NEKUDOTAYIM in /in/2Xacb on line 47
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/2Xacb on line 16 Parse error: syntax error, unexpected T_STATIC in /in/2Xacb on line 47
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/2Xacb on line 16 Parse error: parse error, unexpected T_STATIC in /in/2Xacb on line 47
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/2Xacb on line 16 Parse error: parse error in /in/2Xacb on line 47
Process exited with code 255.

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