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run code in 200+ php & hhvm versions
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<?php $a['str'] = 'func'; function func(){return 'StdClass';} var_dump(new $a['str']());
based on iDBUE
Output for 7.0.0 - 7.2.0
Fatal error: Uncaught Error: Class 'func' not found in /in/3fsda:7 Stack trace: #0 {main} thrown in /in/3fsda on line 7
Process exited with code 255.
Output for 5.3.21 - 5.6.28
Fatal error: Class 'func' not found in /in/3fsda on line 7
Process exited with code 255.