3v4l.org

run code in 300+ PHP versions simultaneously
<?php $myarr = array("world cup"); foreach($myarr as &$v){ if(strpos($v,'o')!==false) $myarr[] = str_replace('o','O',$v); if(strpos($v,'O')!==false) $myarr[] = str_replace('O','o',$v); } var_export($myarr);
Output for 8.2.18, 8.3.5 - 8.3.6
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 4096 bytes) in /in/bBLJT on line 7
Process exited with code 255.
Output for 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Out of memory (allocated 25169920 bytes) (tried to allocate 8388616 bytes) in /in/bBLJT on line 9 mmap() failed: [12] Cannot allocate memory mmap() failed: [12] Cannot allocate memory
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.1, 8.1.28
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 33554440 bytes) in /in/bBLJT on line 9
Process exited with code 255.
Output for 8.1.2 - 8.1.27
Fatal error: Out of memory (allocated 29364224) (tried to allocate 16777224 bytes) in /in/bBLJT on line 9 mmap() failed: [12] Cannot allocate memory mmap() failed: [12] Cannot allocate memory
Process exited with code 255.
Output for 7.3.32 - 7.3.33, 8.0.13
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 67108872 bytes) in /in/bBLJT on line 9
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
array ( 0 => 'world cup', 1 => 'wOrld cup', )

preferences:
194.81 ms | 402 KiB | 305 Q