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<?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("$0", "hi")', 'world' => 'tagWorldMethod("$0", "world")', ); $this->template = 'Blah blah {hello} blah blah {world}.'; $this->withRegexReplaceCallback($core, $system_tags); echo $this->template . "\n"; } function withRegexReplaceCallback($core, $system_tags) { $callback = static function ($matches) use (& $tag_method, $system_tags) { $callback = function ($subMatches) use ($matches) { return $matches[$subMatches[1]]; }; $tag_method = preg_replace_callback('/(?:\\\\|\\$)(\d+)/', $callback, $tag_method); 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(); $app->run();
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Deprecated: Creation of dynamic property App::$template is deprecated in /in/1s1oV on line 22 Blah blah (METHOD "tagHelloMethod" WAS CALLED WITH PARAMS {hello}, hi) blah blah (METHOD "tagWorldMethod" WAS CALLED WITH PARAMS {world}, world).
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 Deprecated: Creation of dynamic property App::$template is deprecated in /in/1s1oV on line 22 Blah blah (METHOD "tagHelloMethod" WAS CALLED WITH PARAMS {hello}, hi) blah blah (METHOD "tagWorldMethod" WAS CALLED WITH PARAMS {world}, world).
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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 {hello}, hi) blah blah (METHOD "tagWorldMethod" WAS CALLED WITH PARAMS {world}, world).
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_FUNCTION, expecting T_PAAMAYIM_NEKUDOTAYIM in /in/1s1oV on line 29
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/1s1oV on line 16 Parse error: syntax error, unexpected T_STATIC in /in/1s1oV on line 29
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/1s1oV on line 16 Parse error: parse error, unexpected T_STATIC in /in/1s1oV on line 29
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/1s1oV on line 16 Parse error: parse error in /in/1s1oV on line 29
Process exited with code 255.

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