3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php interface Thing { } class Foo implements Thing { } class Bar extends Foo { } class Zulu { } var_dump( is_subclass_of('Foo', 'Thing'), is_a('Foo', 'Thing', TRUE), is_subclass_of('Bar', 'Thing'), is_a('Bar', 'Thing', TRUE), is_subclass_of('Zulu', 'Thing'), is_a('Zulu', 'Thing', TRUE) );
Output for 5.3.9 - 7.1.7
bool(true) bool(true) bool(true) bool(true) bool(false) bool(false)
Output for 5.3.7 - 5.3.8
Warning: is_a() expects exactly 2 parameters, 3 given in /in/74rhj on line 13 Warning: is_a() expects exactly 2 parameters, 3 given in /in/74rhj on line 15 Warning: is_a() expects exactly 2 parameters, 3 given in /in/74rhj on line 17 bool(true) NULL bool(true) NULL bool(false) NULL
Output for 5.3.0 - 5.3.6
Warning: is_a() expects exactly 2 parameters, 3 given in /in/74rhj on line 13 Warning: is_a() expects exactly 2 parameters, 3 given in /in/74rhj on line 15 Warning: is_a() expects exactly 2 parameters, 3 given in /in/74rhj on line 17 bool(false) NULL bool(true) NULL bool(false) NULL
Output for 5.0.3 - 5.2.17
Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/74rhj on line 13 Warning: Wrong parameter count for is_a() in /in/74rhj on line 13 Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/74rhj on line 15 Warning: Wrong parameter count for is_a() in /in/74rhj on line 15 Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/74rhj on line 17 Warning: Wrong parameter count for is_a() in /in/74rhj on line 17 bool(false) NULL bool(true) NULL bool(false) NULL
Output for 5.0.0 - 5.0.2
Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/74rhj on line 13 Warning: Wrong parameter count for is_a() in /in/74rhj on line 13 Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/74rhj on line 15 Warning: Wrong parameter count for is_a() in /in/74rhj on line 15 Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/74rhj on line 17 Warning: Wrong parameter count for is_a() in /in/74rhj on line 17 bool(false) NULL bool(false) NULL bool(false) NULL
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/74rhj on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/74rhj on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/74rhj on line 2
Process exited with code 255.