在PHP中，哪个更快：preg_split还是爆炸？

This may sound like a stupid question, but: which is faster when using it to extract keywords in a search query in php:

这可能听起来像一个愚蠢的问题,但是:当使用它来提取php中的搜索查询中的关键字时,它会更快:

$keyword = preg_split('/[\s]+/', $_GET['search']);

$keyword = explode(' ', $_GET['search']);

3 个解决方案

#1

Explode is faster, per PHP.net

根据PHP.net,爆炸速度更快

Tip If you don't need the power of regular expressions, you can choose faster (albeit simpler) alternatives like explode() or str_split().

提示如果您不需要正则表达式的强大功能,您可以选择更快(尽管更简单)的替代方法,如explode()或str_split()。

#2

In a simple usage explode() is than faster, see: micro-optimization.com/explode-vs-preg_split ^{(link from web.archive.org)}

在一个简单的用法中,explode()比更快,请参阅:micro-optimization.com/explode-vs-preg_split(来自web.archive.org的链接)

But preg_split has the advantage of supporting tabs (\t) and spaces with \s.

但preg_split的优点是支持标签(\ t)和\ s空格。

the \s metacharacter is used to find a whitespace character.

\ s元字符用于查找空白字符。

A whitespace character can be (http://php.net/manual/en/regexp.reference.escape.php):

一个空格字符可以是(http://php.net/manual/en/regexp.reference.escape.php):

space character (32 = 0x20)

空格字符(32 = 0x20)

tab character (9 = 0x09)

制表符(9 = 0x09)

carriage return character (13 = 0x0D)

回车符(13 = 0x0D)

new line character (10 = 0x0A)

换行符(10 = 0x0A)

form feed character (12 = 0x0C)

换页字符(12 = 0x0C)

In this case you should see the cost and benefit.

在这种情况下,您应该看到成本和收益。

A tip, use array_filter for "delete" empty items in array:

提示,使用array_filter“删除”数组中的空项:

Example:

$keyword = explore(' ', $_GET['search']); //or preg_split
print_r($keyword);

$keyword = array_filter($arr, 'empty');
print_r($keyword);

Note: RegExp Perfomance

注意:RegExp Perfomance

#3

General rule: if you can do something without regular expressions, do it without them!

一般规则:如果你可以在没有正则表达式的情况下做某事,那就不用它们吧!

if you want to split string by spaces, explode is way faster.

如果你想用空格分割字符串,爆炸会更快。

#1