为什么PHP没有捕获“找不到类”错误?溶液:
在下面的示例中,如果该类不存在,我想捕获错误并改为创建一个类。Null
但是,尽管我有 try/catch 语句,但 PHP 只是告诉我 .Class 'SmartFormasdfasdf' not found
如何让PHP捕获“找不到类”错误?
<?php
class SmartFormLogin extends SmartForm {
public function render() {
echo '<p>this is the login form</p>';
}
}
class SmartFormCodeWrapper extends SmartForm {
public function render() {
echo '<p>this is the code wrapper form</p>';
}
}
class SmartFormNull extends SmartForm {
public function render() {
echo '<p>the form "' . htmlentities($this->idCode) . '" does not exist</p>';
}
}
class SmartForm {
protected $idCode;
public function __construct($idCode) {
$this->idCode = $idCode;
}
public static function create($smartFormIdCode) {
$className = 'SmartForm' . $smartFormIdCode;
try {
return new $className($smartFormIdCode);
} catch (Exception $ex) {
return new SmartFormNull($smartformIdCode);
}
}
}
$formLogin = SmartForm::create('Login');
$formLogin->render();
$formLogin = SmartForm::create('CodeWrapper');
$formLogin->render();
$formLogin = SmartForm::create('asdfasdf');
$formLogin->render();
?>
溶液:
谢谢@Mchl,这就是我当时解决它的方式:
public static function create($smartFormIdCode) {
$className = 'SmartForm' . $smartFormIdCode;
if(class_exists($className)) {
return new $className($smartFormIdCode);
} else {
return new SmartFormNull($smartFormIdCode);
}
}