throw语句
throw 表达式;try语句
//句法一
try {
//可能会发生异常的语句
} catch(异常类型 e) {
//处理异常 e
}//句法二
try {
//可能会发生异常的语句
} catch(异常类型 e) {
//处理异常 e
} finally {
//不管是否有异常捕获，finally子句中的代码都会执行
}示例 #1 抛出一个异常
<?php
function inverse($x) {
if (!$x) {
throw new Exception('Division by zero.');
}
return 1/$x;
}
try {
echo inverse(5) . "\n";
echo inverse(0) . "\n";
} catch (Exception $e) {
echo 'Caught exception: ', $e->getMessage(), "\n";
}
// Continue execution
echo "Hello World\n";
?>//输出
0.2
Caught exception: Division by zero.
Hello World示例 #2 带 finally 块的异常处理
<?php
function inverse($x) {
if (!$x) {
throw new Exception('Division by zero.');
}
return 1/$x;
}
try {
echo inverse(5) . "\n";
} catch (Exception $e) {
echo 'Caught exception: ', $e->getMessage(), "\n";
} finally {
echo "First finally.\n";
}
try {
echo inverse(0) . "\n";
} catch (Exception $e) {
echo 'Caught exception: ', $e->getMessage(), "\n";
} finally {
echo "Second finally.\n";
}
// 继续执行
echo "Hello World\n";
?>//输出
0.2
First finally.
Caught exception: Division by zero.
Second finally.
Hello World原创文章，作者：huoxiaoqiang，如若转载，请注明出处：https://www.huoxiaoqiang.com/php/phplang/4973.html
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