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The difference between explode and split functions in php_PHP tutorial

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Release： 2016-07-13 10:48:11
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On one level, there is no difference between the explode and split functions in PHP. They are used to separate characters into arrays. But if you look carefully, there is still a difference between explode and split. Let me introduce them to you.

First let’s look at the definitions of the two methods:

Function prototype: array split (string $pattern, string $string [, int $limit])

Function prototype: array explode ( string $separator, string $string [, int $limit])

At first glance, there is no difference. They seem to have the same functions. I made this mistake. Please note that the first parameters of the two functions are string $pattern and string separator. One is that $pattern is a regular string, and the other is that $separator is an ordinary string. Look at the code below:

Example 2. split() Example
The code is as follows
 代码如下 复制代码

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

echo $test;//output txt

换成:

$test1 = end(split('.','abc.txt'));

echo $test1;//no output
Copy code

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

echo $test;//output txt

Replaced with:

$test1 = end(split('.','abc.txt'));


echo $test1;//no output


The correct way to use split is to add the escape symbol

$test1 = end(split('.','abc.txt'));

echo $test1;//output txt


Analysis: "." symbol is a keyword of regular expression, so split is invalid, while explode is valid.

Parse dates that may be separated by slashes, dots, or dashes:
// The delimiter can be a slash, dot, or horizontal line
$date = "04/30/1973 "; echo "Month: $month; Day: $day; Year: $year
n "; ?>  To emulate similar @chars = split( ' ', $str) behavior in Perl, please refer to the example in the preg_split() function. Note that pattern is a regular expression. If the delimiting character you want to use is a special character in a regular expression, you must escape it first. If you think split() (or any other regex function) behaves strangely, please read the regex.7 file included in the regex/ subdirectory of the PHP distribution. The file is in manual page format
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www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/632794.htmlTechArticleAt one level, there is no difference between the explode and split functions in PHP. They are both used to separate characters into arrays. , but if you look carefully there is still a difference between explode and split, let me explain...
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