3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?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, $system_tags) { return eval('$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();
based on HWRqX
Output for 5.4.0 - 7.2.0
Blah blah (METHOD "tagHelloMethod" WAS CALLED WITH PARAMS 1, 2) blah blah (METHOD "tagWorldMethod" WAS CALLED WITH PARAMS 3, 4). Blah blah blah blah .
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_FUNCTION, expecting T_PAAMAYIM_NEKUDOTAYIM in /in/WJ4Zc on line 47
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/WJ4Zc on line 16 Parse error: syntax error, unexpected T_STATIC in /in/WJ4Zc on line 47
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/WJ4Zc on line 16 Parse error: parse error, unexpected T_STATIC in /in/WJ4Zc 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/WJ4Zc on line 16 Parse error: parse error in /in/WJ4Zc on line 47
Process exited with code 255.