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<?php function foo( &$arg1, &$arg2 ) { var_dump( $arg1, $arg2 ); } $a = 1; $b = 2; call_user_func_array( 'foo', array( $a, $b ) );
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.16, 8.3.0 - 8.3.3
Warning: foo(): Argument #1 ($arg1) must be passed by reference, value given in /in/JDcqk on line 7 Warning: foo(): Argument #2 ($arg2) must be passed by reference, value given in /in/JDcqk on line 7 int(1) int(2)
Output for 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Parameter 1 to foo() expected to be a reference, value given in /in/JDcqk on line 7 Warning: Parameter 2 to foo() expected to be a reference, value given in /in/JDcqk on line 7 int(1) int(2)
Output for 5.6.38, 7.0.33
Warning: Parameter 1 to foo() expected to be a reference, value given in /in/JDcqk on line 7

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