The mb_substr of PHP string splitting function

PHP has a lot of ways of handling strings , and tonight we've chosen a very representative and widely used function to explain that the word

character string Split function:mb_substr (), I hope you will recognize really learn Learning Comprehension!

Mb_substr () has a few parameters, usually 3 or 4 parameters, we especially say the last parameter, is to set the encoding

Below we look at the code by the case of different, the result of what a huge difference

$str = ' We all have a dream rventrc ';
$str = Mb_substr ($str, 0,3); Since no encoding is specified, the 1 Chinese characters are 3 characters long and output: ' I '
$str = Mb_substr ($str, 0,3, ' UTF8 '); Because the UTF8 encoding is specified, a Chinese character is 1 characters long and therefore outputs: ' We all '
$str = Mb_substr ($str, -4,2, ' UTF8 '); This means starting from the bottom 4th , capturing 2-length characters
The expression starts at subscript 2 and is truncated to the 5th character (minus 5th), so the result is: ' There's a dream RV '

$str = Mb_substr ($str, 2, -5, ' UTF8 ');

Through tonight's detailed analysis, we have a clearer understanding of the interception of Chinese strings, in fact, the setup code is easy to solve,

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The above describes the PHP string splitting function mb_substr, including the aspects of the content, I hope to be interested in PHP tutorial friends helpful.

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