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<?php class Auto{ private $farba; private $nazov; public function __construct($paFarba, $paNazov){ $this->farba = $paFarba; $this->nazov = $paNazov; } public function getFarba(){ return $this->farba; } public function getNazov(){ return $this->nazov; } public function __toString(){ return "Auto: {$this->nazov} {$this->farba}"; } public function compareNazov($obj1, $obj2){ return strcmp($obj1->nazov, $obj2->nazov); } public function compareFarba($obj1, $obj2){ return strcmp($obj1->farba, $obj2->farba); } } $cars = array(new Auto("Zlta", "Volvo"), new Auto("Cervena", "Skoda"), new Auto("Zelena", "Octavia")); $car = new Auto("Fialova", "Toyota"); $length = count($cars); for ($i = 0; $i < $length; $i++){ echo $cars[$i]; echo "<br>"; } usort($cars, "compareNazov"); for ($i = 0; $i < $length; $i++){ echo $cars[$i]; echo "<br>"; } ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Auto: Volvo Zlta<br>Auto: Skoda Cervena<br>Auto: Octavia Zelena<br> Fatal error: Uncaught TypeError: usort(): Argument #2 ($callback) must be a valid callback, function "compareNazov" not found or invalid function name in /in/ViOvB:42 Stack trace: #0 /in/ViOvB(42): usort(Array, 'compareNazov') #1 {main} thrown in /in/ViOvB on line 42
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Auto: Volvo Zlta<br>Auto: Skoda Cervena<br>Auto: Octavia Zelena<br> Warning: usort() expects parameter 2 to be a valid callback, function 'compareNazov' not found or invalid function name in /in/ViOvB on line 42 Auto: Volvo Zlta<br>Auto: Skoda Cervena<br>Auto: Octavia Zelena<br>
preferences:
255.12 ms | 403 KiB | 337 Q