PHP preg_last_error() 函数
PHP 教程
· 2019-01-31 12:14:27
preg_last_error 函数用于返回最后一个 PCRE 正则执行产生的错误代码。
语法
int preg_last_error ( void )
实例
返回数组中指定匹配的元素：
preg_match('/(?:\D+|<\d+>)*[!?]/', 'foobar foobar foobar');
if (preg_last_error() == PREG_BACKTRACK_LIMIT_ERROR) {
print 'Backtrack limit was exhausted!';
}
执行结果如下所示：
Backtrack limit was exhausted!
返回值
- PREG_NO_ERROR
- PREG_INTERNAL_ERROR
- PREG_BACKTRACK_LIMIT_ERROR
- PREG_RECURSION_LIMIT_ERROR
- PREG_BAD_UTF8_ERROR
- PREG_BAD_UTF8_OFFSET_ERROR
参数详细说明可查看：PHP 正则表达式(PCRE)
点击查看所有 PHP 教程 文章: https://codercto.com/courses/l/5.html
Mastering Bitcoin
Andreas M. Antonopoulos / O'Reilly Media / 2014-12-20 / USD 34.99
Mastering Bitcoin tells you everything you need to know about joining one of the most exciting revolutions since the invention of the web: digital money. Bitcoin is the first successful digital curren......一起来看看 《Mastering Bitcoin》 这本书的介绍吧!
