Online PHP editor | output for 1UCQd

@ 2017-07-21T16:05:17Z

<?php

function closure_to_str($func)
{
    $refl = new \ReflectionFunction($func); // get reflection object
    $path = $refl->getFileName();  // absolute path of php file
    $begn = $refl->getStartLine(); // have to `-1` for array index
    $endn = $refl->getEndLine();
    $dlim = "\n"; // or PHP_EOL
    $list = explode($dlim, file_get_contents($path));         // lines of php-file source
    $list = array_slice($list, ($begn-1), ($endn-($begn-1))); // lines of closure definition
    $last = (count($list)-1); // last line number

    if((substr_count($list[0],'function')>1)|| (substr_count($list[0],'{')>1) || (substr_count($list[$last],'}')>1))
    { throw new \Exception("Too complex context definition in: `$path`. Check lines: $begn & $endn."); }

    $list[0] = ('function'.explode('function',$list[0])[1]);
    $list[$last] = (explode('}',$list[$last])[0].'}');

    return implode($list,$dlim);
}

$dog = ['bark'=>function(){}];
$dog2 = ['bark'=>function($foo = '{'){}];

echo closure_to_str($dog['bark'])."\n\n";
echo closure_to_str($dog2['bark'])."\n\n";

Output for 8.4.1 - 8.4.18, 8.5.0 - 8.5.3: Fatal error: Uncaught TypeError: implode(): Argument #1 ($separator) must be of type string, array given in /in/1UCQd:20 Stack trace: #0 /in/1UCQd(20): implode(Array, '\n') #1 /in/1UCQd(26): closure_to_str(Object(Closure)) #2 {main} thrown in /in/1UCQd on line 20
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30: Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array, string given in /in/1UCQd:20 Stack trace: #0 /in/1UCQd(20): implode(Array, '\n') #1 /in/1UCQd(26): closure_to_str(Object(Closure)) #2 {main} thrown in /in/1UCQd on line 20
Process exited with code 255.
Output for 7.4.0 - 7.4.33: Deprecated: implode(): Passing glue string after array is deprecated. Swap the parameters in /in/1UCQd on line 20 function(){} Fatal error: Uncaught Exception: Too complex context definition in: `/in/1UCQd`. Check lines: 24 & 24. in /in/1UCQd:15 Stack trace: #0 /in/1UCQd(27): closure_to_str(Object(Closure)) #1 {main} thrown in /in/1UCQd on line 15
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33: function(){} Fatal error: Uncaught Exception: Too complex context definition in: `/in/1UCQd`. Check lines: 24 & 24. in /in/1UCQd:15 Stack trace: #0 /in/1UCQd(27): closure_to_str(Object(Closure)) #1 {main} thrown in /in/1UCQd on line 15
Process exited with code 255.

preferences:dark modelive previewkey bindings