Online PHP editor | output for ntMhs

@ 2013-12-13T01:43:27Z

<?php
call_user_func(function(){
    echo 'val_val' . PHP_EOL;

    $a = "xxx";
    $b = $a;
    $c = $b;

    ob_start(function ($s) { return preg_replace('/^/m', "  ", $s); });
    xdebug_debug_zval('a', 'b', 'c');
    ob_end_flush();
});

call_user_func(function(){
    echo 'ref_val' . PHP_EOL;

    $a = "xxx";
    $b = &$a;
    $c = $b;

    ob_start(function ($s) { return preg_replace('/^/m', "  ", $s); });
    xdebug_debug_zval('a', 'b', 'c');
    ob_end_flush();
});

call_user_func(function(){
    echo 'val_ref' . PHP_EOL;

    $a = "xxx";
    $b = $a;
    $c = &$b;

    ob_start(function ($s) { return preg_replace('/^/m', "  ", $s); });
    xdebug_debug_zval('a', 'b', 'c');
    ob_end_flush();
});

call_user_func(function(){
    echo 'ref_ref' . PHP_EOL;

    $a = "xxx";
    $b = &$a;
    $c = &$b;

    ob_start(function ($s) { return preg_replace('/^/m', "  ", $s); });
    xdebug_debug_zval('a', 'b', 'c');
    ob_end_flush();
});

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: val_val Fatal error: Uncaught Error: Call to undefined function xdebug_debug_zval() in /in/ntMhs:10 Stack trace: #0 /in/ntMhs(12): {closure}() #1 {main} thrown in /in/ntMhs on line 10
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28: val_val Fatal error: Call to undefined function xdebug_debug_zval() in /in/ntMhs on line 10
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, expecting ')' in /in/ntMhs on line 2
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, expecting ')' in /in/ntMhs on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `')'' in /in/ntMhs on line 2
Process exited with code 255.

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