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run code in 150+ php & hhvm versions
Bugs & Features
<?php function userland_func_num_args() { return count(debug_backtrace()[1]['args'][$idx]); } function foo() { return func_num_args(); } function bar() { return userland_func_num_args(); } var_dump(foo('foo', 'bar')); var_dump(bar('foo', 'bar'));
based on vcYso
Output for 5.4.0 - 5.6.28, 7.0.0 - 7.1.0
int(2) Notice: Undefined variable: idx in /in/PkHEN on line 3 Notice: Undefined index: in /in/PkHEN on line 3 int(0)
Output for hhvm-3.10.0 - 3.12.0
int(2) Notice: Undefined index: in /in/PkHEN on line 3 int(0)
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/PkHEN on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/PkHEN on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/PkHEN on line 3
Process exited with code 255.