Php source code analysis using the DZX1.5 string truncation function cutstr

Php source code analysis using the DZX1.5 string truncation function cutstr

This article describes how to use the DZX1.5 string truncation function cutstr in php source code analysis. Share it with you for your reference. The specific analysis is as follows:

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<? Php /** * Function source DZX1.5, file/source/function/function_core.php */ Define ('charset', 'utf-8 '); Function cutstr ($ string, $ length, $ dot = "..."){ If (strlen ($ string) <= $ length ){ Return $ string; } If (strtolower (CHARSET) = "UTF-8 "){ $ N = $ tn = $ noc = 0; While ($ n <strlen ($ string )){ $ T = ord ($ string [$ n]); If ($ t = 9 | $ t = 10 | (32 <= $ t & $ t <= 126 )){ $ Tn = 1; $ n ++; $ noc ++; } Elseif (194 <=$ t & $ t <= 223 ){ $ Tn = 2; $ n + = 2; $ noc + = 2; } Elseif (224 <=$ t & $ t <= 239 ){ $ Tn = 3; $ n + = 3; $ noc + = 2; } Elseif (240 <=$ t & $ t <= 247 ){ $ Tn = 4; $ n + = 4; $ noc + = 2; } Elseif (248 <=$ t & $ t <= 251 ){ $ Tn = 5; $ n + = 5; $ noc + = 2; } Elseif ($ t = 252 | $ t = 253 ){ $ Tn = 6; $ n + = 6; $ noc + = 2; } Else { $ N ++; } If ($ noc >=$ length ){ Break; } } If ($ noc> $ length ){ $ N-= $ tn; } $ Strcut = substr ($ string, 0, $ n ); } Else { For ($ I = 0; $ I <$ length; $ I ++ ){ $ Strcut. = ord ($ string [$ I]) & gt; 127? $ String [$ I]. $ string [++ $ I]: $ string [$ I]; } } $ Pos = strrpos ($ strcut, chr (1 )); If ($ pos! = False ){ $ Strcut = substr ($ strcut, 0, $ pos ); } Return $ strcut. $ dot; } $ String = 'test database ablci102020 @(#)!)! Test labor ddk '; Echo cutstr ($ string, 15 ); /* End of php */

The running result is as follows:

Test Database ablci1020...

I hope this article will help you with php programming.