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php中explode与split的区别介绍_PHP

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Release: 2016-06-01 12:08:54
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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。

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