Application example of php split() string splitting function

Note that pattern is a regular expression. If the separation character you want to use is a special character in the regular expression, you must escape it first.

You 2, split the first four fields in /etc/passwd:

If there are n items in the string that match pattern, the returned array will contain n+1 cells. For example, if pattern is not found, a one-element array is returned. Of course, this is also true if string is empty.

Example 3, parse dates that may be separated by slashes, dots, or horizontal lines:

Note: 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 the PHP function split() (or any other regex function) behaves strangely, please read the regex.7 file included in the regex/ subdirectory of the PHP distribution. This file is in man page format and can be read with a command like man /usr/local/src/regex/regex.7.

Split a piece of text according to the number of words, because the text may be a mixture of Chinese and English, and the PHP function strlen can only calculate the number of bytes of the string, so I implemented several functions and shared them.

Example 1, calculate the total length of characters.

<?php
function ccStrLen($str) #计算中英文混合字符串的长度
{
$ccLen=0;
$ascLen=strlen($str);
$ind=0;
$hasCC=ereg(”[xA1-xFE]“,$str); #判断是否有汉字
$hasAsc=ereg(”[x01-xA0]“,$str); #判断是否有ASCII字符
if($hasCC && !$hasAsc) #只有汉字的情况
return strlen($str)/2;
if(!$hasCC && $hasAsc) #只有Ascii字符的情况
return strlen($str);
for($ind=0;$ind<$ascLen;$ind++)
{
if(ord(substr($str,$ind,1))>0xa0)
{
$ccLen++;
$ind++;
}
else
{
$ccLen++;
}
}
return $ccLen;
}
?>

Example 2, intercept the string from the left side.

<?php
function ccStrLeft($str,$len) #从左边截取中英文混合字符串
{
$ascLen=strlen($str); if($ascLen<=$len) return $str;
$hasCC=ereg(”[xA1-xFE]“,$str); #同上
$hasAsc=ereg(”[x01-xA0]“,$str);
if(!$hasCC) return substr($str,0,$len);
if(!$hasAsc)
if($len & 0×01) #如果长度是奇数
return substr($str,0,$len+$len-2);
else
return substr($str,0,$len+$len);
$cind=0;$flag=0;$reallen=0;//实际取字节长
while($cind<$ascLen && $reallen<$len)
{ //by bbs.it-home.org
if(ord(substr($str,$cind,1))<0xA1){ //如果该字节为英文 则加一
$cind++;
}else{//否则 加2个字节
$cind+=2;
}
$reallen++;
}
return substr($str,0,$cind);
}
?>

Example 3, store the given text into an array according to the number of cuts (suitable for short text, long articles can be processed directly without dividing a part)

<?php
function SplitContent($content,$smslen){
$str_tmp=$content;
$arr_cont=array();
$len_tmp=0;
$i=0;//分割绝对位置
while (strlen($str_tmp)>0){
$str_tmp=ccStrLeft($str_tmp,$smslen);
array_push($arr_cont,$str_tmp);
$i+=strlen($str_tmp);
$str_tmp=substr($content,$i,strlen($content));
}
return $arr_cont;
} //by bbs.it-home.org
?>

Test:

<?php
$str=’a计算中英文混合1234字符串的长度abcd’;
echo $str.’的长度为：’.ccStrLen($str);
echo ‘<br>’;
$smslen=3;//截取长度
print_r(SplitContent($str,$smslen));
?>

Segmentation results: Array ( [0] => a calculation [1] => Chinese and English [2] => Mix 1 [3] => 234 [4] => string [5] => length of [6] => abc [7] => d )