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@ 2014-08-29T21:23:55Z

<?php

function filterTagsByTypes(array $tags, array $types, $count = 1) {
    $returnTags = [];
    sort($types); //Sort from low to high => high priority to low priority
    usort($tags, function($a, $b) {
        if ($a->type == $b->type) {
            return 0;
        }
        return $a->type > $b->type ? 1 : -1;
    }); //Sort tags array from low type to high type.
    foreach ($types as $type) {
        foreach ($tags as $tag) {
            //In this case, since both arrays are sorted, the priority
            //you are looking for will not arrive.
            if ($tag->type > $type) {
                break; //So break out and continue to the next type.
            }
            if ($tag->type == $type) {
                $returnTags[] = $tag;
            }
            if (count($returnTags) >= $count) { //End it now!
                return $returnTags;
            }
        }
    }
}

// Usage:

class Tag {
    private $type;
    function __construct($type) {
        $this->type = $type;
    }
}

$tags = [
    new Tag(50),
    new Tag(1),
    new Tag(25)
];

$types = [1, 50];

var_dump(filterTagsByTypes($tags, $types));

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught Error: Cannot access private property Tag::$type in /in/99BBI:7 Stack trace: #0 [internal function]: {closure}(Object(Tag), Object(Tag)) #1 /in/99BBI(6): usort(Array, Object(Closure)) #2 /in/99BBI(46): filterTagsByTypes(Array, Array) #3 {main} thrown in /in/99BBI on line 7
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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