array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'zh', ), 'this' => array ( 0 => 'generator.throw.php', 1 => 'Generator::throw', ), 'up' => array ( 0 => 'class.generator.php', 1 => 'Generator', ), 'prev' => array ( 0 => 'generator.send.php', 1 => 'Generator::send', ), 'next' => array ( 0 => 'generator.valid.php', 1 => 'Generator::valid', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'zh', 'path' => 'language/predefined/generator/throw.xml', ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); ?>
(PHP 5 >= 5.5.0, PHP 7, PHP 8)
Generator::throw — 向生成器中抛入一个异常
抛出一个异常到生成器并恢复生成器的执行。
与当前 yield 表达式被 throw $exception
语句替换是一样的行为。
如果调用此方法时生成器已经关闭,则将会在调用者的上下文中抛出异常。
exception
抛出异常到生成器。
返回生成的值。
示例 #1 抛出异常到生成器
<?php
function gen() {
echo "Foo\n";
try {
yield;
} catch (Exception $e) {
echo "Exception: {$e->getMessage()}\n";
}
echo "Bar\n";
}
$gen = gen();
$gen->rewind();
$gen->throw(new Exception('Test'));
?>
以上示例会输出:
Foo Exception: Test Bar