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@ 2014-04-10T19:16:55Z

<?php

class NameObj {

    public $name;

    function __construct($name){
        $this->name = $name;
    }
}

class IdObj{

    public $id;

    function __construct($id){
        $this->id = $id;
    }
}

$idArray = array(
    new IdObj(1),
    new IdObj(2),
    new IdObj(3)
);

$nameArray = array(
    new NameObj('1 - Object 1 Name'),
    new NameObj('2 - Object 2 Name')
);

function custom_diff($oId, $oName){
    $temp  = $oId;
    $oId   = $oId instanceof IdObj?$oId:$oName;
    $oName = $oName instanceof NameObj?$oName:$temp;
    
    $splitName = explode(' - ', $oName->name);
    $idFromName = $splitName[0];

    $id = $oId->id;

    if($idFromName == $id) return 0;
    return $idFromName > $id ? 1 : -1;
}

$missing_objects = array_udiff($idArray, $nameArray, 'custom_diff');

print_r($missing_objects);

Output for git.master, git.master_jit, rfc.property-hooks: Warning: Undefined property: IdObj::$name in /in/DPJiL on line 37 Deprecated: explode(): Passing null to parameter #2 ($string) of type string is deprecated in /in/DPJiL on line 37 Warning: Undefined property: IdObj::$name in /in/DPJiL on line 37 Deprecated: explode(): Passing null to parameter #2 ($string) of type string is deprecated in /in/DPJiL on line 37 Warning: Undefined property: NameObj::$id in /in/DPJiL on line 40 Warning: Undefined property: IdObj::$name in /in/DPJiL on line 37 Deprecated: explode(): Passing null to parameter #2 ($string) of type string is deprecated in /in/DPJiL on line 37 Warning: Undefined property: IdObj::$name in /in/DPJiL on line 37 Deprecated: explode(): Passing null to parameter #2 ($string) of type string is deprecated in /in/DPJiL on line 37 Array ( [1] => IdObj Object ( [id] => 2 ) [2] => IdObj Object ( [id] => 3 ) )

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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