Function mb_substr
Get part of string
 Package: Cake
Copyright: Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
License: MIT License
Located at Cake/bootstrap.php
 
 Copyright: Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
License: MIT License
Located at Cake/bootstrap.php
mb_substr( string $string integer $start integer $length null string $encoding null )
Parameters summary
string |  $string |  The string being checked. | 
integer |  $start |  The first position used in $string. | 
integer |  $length = null |  The maximum length of the returned string. | 
string |  $encoding = null |  Character encoding name to use. If it is omitted, internal character encoding is used. | 
Returns
-  
stringThe portion of $string specified by the $string and $length parameters. 
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    https://api.cakephp.org/2.10/function-mb_substr.html