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<?php echo preg_replace("#_([a-z])#",function($r){ return ucfirst($r); },'abc_def_ghj');
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Fatal error: Uncaught TypeError: preg_replace(): Argument #2 ($replacement) must be of type array|string, Closure given in /in/mj0ZJ:3 Stack trace: #0 /in/mj0ZJ(3): preg_replace('#_([a-z])#', Object(Closure), 'abc_def_ghj') #1 {main} thrown in /in/mj0ZJ on line 3
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Fatal error: Uncaught TypeError: preg_replace(): Argument #2 ($replacement) must be of type array|string, Closure given in /in/mj0ZJ:3 Stack trace: #0 /in/mj0ZJ(3): preg_replace('#_([a-z])#', Object(Closure), 'abc_def_ghj') #1 {main} thrown in /in/mj0ZJ on line 3
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Fatal error: Uncaught TypeError: preg_replace(): Argument #2 ($replacement) must be of type array|string, Closure given in /in/mj0ZJ:5 Stack trace: #0 /in/mj0ZJ(5): preg_replace('#_([a-z])#', Object(Closure), 'abc_def_ghj') #1 {main} thrown in /in/mj0ZJ on line 5
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Fatal error: Uncaught Error: Object of class Closure could not be converted to string in /in/mj0ZJ:5 Stack trace: #0 /in/mj0ZJ(5): preg_replace('#_([a-z])#', Object(Closure), 'abc_def_ghj') #1 {main} thrown in /in/mj0ZJ on line 5
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Recoverable fatal error: Object of class Closure could not be converted to string in /in/mj0ZJ on line 5
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, 5.6.7 - 5.6.21, 7.0.0 - 7.0.20
Catchable fatal error: Object of class Closure could not be converted to string in /in/mj0ZJ on line 5
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
Parse error: syntax error, unexpected T_FUNCTION in /in/mj0ZJ 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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/mj0ZJ on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/mj0ZJ on line 3
Process exited with code 255.

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