Common php functions
Strstr (string, string) // truncate from the place where a string appears for the first time to the end
Strrchr (string, string) // captures a string from its last position to its end.
Strpos (string, string [, int]) // position where a string appears for the first time
Strrpos (string, string) // position of the last occurrence of a string
Substr (string, int [, int]) // truncates a string from a specified position. You can specify the length of the string.
Strlen (string) // Obtain the string length. PHP intercepts the characters between the start and end tags.
Method 1: Use explode to split strings
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/**
* Get the content between $ start and $ end
*
* @ Param string $ original content character
* @ Param string $ start character
* @ Param string $ end character
* @ Return string
*/
Function GetStringBetween ($ content, $ start, $ end ){
$ R = explode ($ start, $ content );
If (isset ($ r [1]) {
$ R = explode ($ end, $ r [1]);
Return $ r [0];
}
Return '';
} |
Method 2: Use substr to intercept characters. Because of the php component functions, the string processing efficiency is higher than that of The explode method.
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/**
* Get the content between $ start and $ end
*
* @ Param string $ original content character
* @ Param string $ start character
* @ Param string $ end character
* @ Return string
*/
Function get_string_between ($ string, $ start, $ end ){
$ String = "". $ string;
$ Ini = strpos ($ string, $ start );
If ($ ini = 0) return "";
$ Ini + = strlen ($ start );
$ Len = strpos ($ string, $ end, $ ini)-$ ini;
Return substr ($ string, $ ini, $ len );
}
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PHP intercepts all strings that match the start and end tags
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/**
* Get all every strings between two tags
*
* @ Param string $ string original string
* @ Param string $ start string
* @ Param string $ end string
* @ Return array
*/
Function get_all_strings_between ($ string, $ start, $ end)
{
// Returns an array of all values which are between two tags in a set of data
$ Strings = array ();
$ StartPos = 0;
$ I = 0;
// Echo strlen ($ string). "n ";
While ($ startPos <strlen ($ string) & $ matched = get_string_between (substr ($ string, $ startPos), $ start, $ end ))
{
If ($ matched = null | $ matched [1] = null | $ matched [1] = '') break;
$ StartPos = $ matched [0] + $ startPos + 1;
Array_push ($ strings, $ matched [1]);
$ I ++;
}
Return $ strings;
}
Function get_string_between ($ string, $ start, $ end ){
$ Ini = strpos ($ string, $ start );
If ($ ini = 0) return null;
$ Ini + = strlen ($ start );
$ Len = strpos ($ string, $ end, $ ini)-$ ini;
Return array ($ ini + $ len, substr ($ string, $ ini, $ len ));
} |
The characters between the start and end mark of the php truncation, with the number of interceptions and whether repeated options are allowed
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/**
* Get all every strings between two tags
*
* @ Param string $ string original string
* @ Param string $ start string
* @ Param string $ end string
* @ Return array
*/
Function get_all_strings_between ($ string, $ start, $ end)
{
// Returns an array of all values which are between two tags in a set of data
$ Strings = array ();
$ StartPos = 0;
$ I = 0;
// Echo strlen ($ string). "n ";
While ($ startPos <strlen ($ string) & $ matched = get_string_between (substr ($ string, $ startPos), $ start, $ end ))
{
If ($ matched = null | $ matched [1] = null | $ matched [1] = '') break;
$ StartPos = $ matched [0] + $ startPos + 1;
Array_push ($ strings, $ matched [1]);
$ I ++;
}
Return $ strings;
} Function get_string_between ($ string, $ start, $ end ){
$ Ini = strpos ($ string, $ start );
If ($ ini = 0) return null;
$ Ini + = strlen ($ start );
$ Len = strpos ($ string, $ end, $ ini)-$ ini;
Return array ($ ini + $ len, substr ($ string, $ ini, $ len ));
} |
Truncates GB2312 Chinese strings.
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<? Php
// Truncate a Chinese string
Function mysubstr ($ str, $ start, $ len ){
$ Tmpstr = "";
$ Strlen = $ start + $ len;
For ($ I = 0; $ I <$ strlen; $ I ++ ){
If (ord (substr ($ str, $ I, 1)> 0xa0 ){
$ Tmpstr. = substr ($ str, $ I, 2 );
$ I ++;
} Else
$ Tmpstr. = substr ($ str, $ I, 1 );
}
Return $ tmpstr;
}
?> |
Truncates UTF-8 encoded multi-byte strings.
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<? Php
// Truncate the utf8 string
Function utf8Substr ($ str, $ from, $ len)
{
Return preg_replace ('# ^ (? : [\ X00-\ x7F] | [\ xC0-\ xFF] [\ x80-\ xBF] +) {0, '. $ from .'}'.
'((? : [\ X00-\ x7F] | [\ xC0-\ xFF] [\ x80-\ xBF] +) {0 ,'. $ len. '}). * # s ',
'$ 1', $ str );
}
?> |
