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<?php function stringInterpolate($str, array $vars) { return preg_replace_callback('/\{\$(\w+)\}/', function($matches){ return $matches[0]; }); } echo stringInterpolate('{$name} {$surname}', array('name' => 'foo', 'surname' => 'Bar'));
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught ArgumentCountError: preg_replace_callback() expects at least 3 arguments, 2 given in /in/h04Kb:5 Stack trace: #0 /in/h04Kb(5): preg_replace_callback('/\\{\\$(\\w+)\\}/', Object(Closure)) #1 /in/h04Kb(10): stringInterpolate('{$name} {$surna...', Array) #2 {main} thrown in /in/h04Kb on line 5
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Fatal error: Uncaught ArgumentCountError: preg_replace_callback() expects at least 3 arguments, 2 given in /in/h04Kb:7 Stack trace: #0 /in/h04Kb(7): preg_replace_callback('/\\{\\$(\\w+)\\}/', Object(Closure)) #1 /in/h04Kb(10): stringInterpolate('{$name} {$surna...', Array) #2 {main} thrown in /in/h04Kb on line 7
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 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
Warning: preg_replace_callback() expects at least 3 parameters, 2 given in /in/h04Kb on line 7
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/h04Kb on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/h04Kb on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY, expecting '&' or T_VARIABLE or T_CONST in /in/h04Kb on line 3
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
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE or T_CONST in /in/h04Kb on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'&'' or `T_VARIABLE' or `T_CONST' in /in/h04Kb on line 3
Process exited with code 255.

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