Online PHP editor | output for 5NTvg

@ 2018-12-19T16:39:40Z

<?php

// Return type declaration, 
// how does it work with nullable declaration
// and void / null / nothing returned ...

function return_null_or_void_1(): ?string {
    return null;
}

function return_null_or_void_2(): ?string {
    return;
}

function return_null_or_void_3(): ?string {
   //  return;
}


var_dump(return_null_or_void_1()).'<br>';
var_dump(return_null_or_void_2()).'<br>';
var_dump(return_null_or_void_3()).'<br>';

Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.20, 8.3.0 - 8.3.8: Fatal error: A function with return type must return a value (did you mean "return null;" instead of "return;"?) in /in/5NTvg on line 12
Process exited with code 255.
Output for 7.0.0 - 7.0.33: Parse error: syntax error, unexpected '?' in /in/5NTvg on line 7
Process exited with code 255.
Output for 5.6.0 - 5.6.40: Parse error: syntax error, unexpected ':', expecting '{' in /in/5NTvg on line 7
Process exited with code 255.

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