Online PHP editor | output for 6O94O

@ 2014-12-12T03:46:16Z

<?php

// test data

class Foo
{
    private $a;

    public function __construct($a)
    {
        $this->a = (int) $a;
    }
    
    public function hasGreaterAThan(self $another)
    {
        return $this->a > $another->a;
    }
}

$list = [
    $foo1 = new Foo(2),
    $foo2 = new Foo(5),
    $foo3 = new Foo(1),
];


/**
 * Finds an item in a list via a comparison function
 * 
 * @param  array    $aList      the collection to examine
 * @param  callable $comparison should compare two arguments and return a bool
 * @return mixed
 */
$find_by = function(array $aList, callable $comparison) {
    $callback = function($carry, $item) use ($comparison) {
        return ($carry == null || $comparison($item, $carry)) ? $item : $carry;
    };
    return array_reduce($aList, $callback);
};

$greaterA = function(Foo $foo1, Foo $foo2) {
    return $foo1->hasGreaterAThan($foo2);
};

$lesserA = function(Foo $foo1, Foo $foo2) {
    return $foo2->hasGreaterAThan($foo1);
};


assert($find_by($list, $greaterA) === $foo2);
assert($find_by($list, $lesserA) === $foo3);

Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/6O94O on line 20
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[' in /in/6O94O on line 20
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/6O94O on line 7
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: Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/6O94O on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/6O94O on line 7
Process exited with code 255.

preferences:dark modelive preview