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php中explode与split的区别介绍_php技巧

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Release： 2016-05-17 09:08:39
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首先来看下两个方法的定义：

函数原型：array split (string $pattern, string $string [, int $limit])

函数原型：array explode ( string $separator, string $string [, int $limit])

初看没有啥差别，貌似功能都一样。我就犯了这个错误。 请注意两个函数的第一个参数string $pattern和string separator，一个是$pattern说明是正则字符串，一个是$separator是普通字符串。

看下面的代码：

复制代码 代码如下:

$test = end(explode('.', 'abc.txt'));
echo $test;//output txt

换成:
复制代码 代码如下:

$test1 = end(split('.','abc.txt'));
echo $test1;//no output

用split的正确做法是：加转义符号
复制代码 代码如下:

$test1 = end(split('\.','abc.txt'));
echo $test1;//output txt


分析："." 符号是正则表达式的关键字所以split无效，而explode有效。
Related labels：
explode split
source：php.cn
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