Strings in PHP explained in detail

String is one of the commonly used data types in PHP and is often used in our daily PHP development. A string is a sequence of characters composed of numbers, letters, and underscores. It is a data type that represents text in programming languages. Strings are stored like character arrays, so each individual element of a string can be extracted.

1. mb_strimwidth string interception function uses & UTF8 encoding understanding

'; echo mb_strwidth("A", "UTF-8") . '
'; echo mb_strwidth("a", "UTF-8") . '
'; echo mb_strwidth("月", "UTF-8") . '
'; echo mb_strwidth("6月9日OUR系统升级通知", "UTF-8") . '
'; echo mb_strimwidth("6月9日OUR系统升级通知", 0, 10, '...') .'
'; echo mb_strimwidth("6月9日OUR系统升级通知", 0, 10, '...', "UTF-8") .'
'; echo mb_strimwidth("6月9日OUR系统升级通知", 0, 10, '......', "UTF-8") .'
'; echo mb_strimwidth("6月9日OUR系统升级通知", 0, 10, '', "UTF-8") .'
'; ?>

This function requires the system to load mb (multi-byte ) extension, the $trimmarker parameter will affect the result, and its length is also included in the result.

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