PHP uses the preg_split function to split strings containing newlines and semicolons

This article mainly introduces the use of preg_split function in PHP to split strings containing newlines and semicolons. It has certain reference value. Now I share it with you. Friends in need can refer to it

preg_ split() Function is used to split strings using regular expressions. Its main difference from the <span class="hljs-keyword" style="color:rgb(167,29,93);">split</span>() and explode() functions is:

<span class="hljs-keyword" style="color:rgb(167,29,93);">split</span>()Function: Use regular expressions to split the string and return an array, if an error occurs, <span class="hljs-literal" style="color:rgb(0,134,179);">false</span>.

preg_split() Function : Uses Perl-compatible regular expression syntax, usually faster than <span class="hljs-keyword" style="color:rgb(167,29,93);">split</span>() .

explode()Function: Use one string to split another string, usually faster than the above two functions.

<span class="hljs-attribute" style="color:rgb(0,134,179);">preg_</span> split() The syntax of the function is:

array preg_split( string pattern, string subject [, int limit [, int flags]] )

Parameter description:

Parameters	Description
pattern	Regular expression
subject	Objects that need to be matched for splitting
limit	Optional, if specified <span class="hljs-built_in">limit</span>, then at most <span class="hljs-built_in">limit</span> substrings will be returned, if <span class="hljs-built_in">limit</span> is <span class="hljs-deletion" style="color:rgb(189,44,0);background-color:rgb(255,236,236);">-1</span> means there is no limit and can be used to continue specifying optional parameters flags
flags	Settings <span class="hljs-built_in">limit</span> is optional after <span class="hljs-deletion" style="color:rgb(189,44,0);background-color:rgb(255,236,236);">-1</span>, and can be any combination of the following tags (combined with the bitwise OR operator |): PREG_SPLIT_NO_EMPTY: Only return non-empty components PREG_SPLIT_DELIM_CAPTURE: Delimited Bracket expressions in character patterns will also be captured and returned PREG_SPLIT_OFFSET_CAPTURE: For each occurrence of the matching result, its associated string offset will also be returned. quantity. Note that this changes the value of the returned array so that each cell in it is also an array, where the first item is the matched string and the second item is its offset within the subject.

这样，我们就有了按换行符和分号分割字符串的方法了。

$result = preg_split('/[;\r\n]+/s', $value);   // 返回数据保存在$result数组中

其中：

\r 表示：回车符(ACSII：13 或0x0d)，就是我们常说的硬回车。

\n 表示：换行(ACSII：10 或0x0a)，就是我们常说的软回车。

分号就不用说了吧：）

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