Introduction to the method of intercepting strings in php

There is a very important technology in php, which is to intercept characters of a specified length in a specified string . PHP can use the PHP pre-defined function substr() function to intercept strings. I believe everyone is very clear about this, so what other methods do I have?

strpos(string,find,start)

<?php  echo strpos("Hello world!","wo");  ?>

substr(string,start,length)

Negative number - starts at the specified position from the end of the string
0 - at the specified position of the string Starting at the first character in

<?php  echo substr("Hello world!",6,5);  ?>

SearchA string in The first occurrence in another string.

strstr('abc@jb51.net', '@', TRUE); //参数设定true, 返回查找值@之前的首部，
abcstrstr( 'abc@jb51.net', '@'); //默认返回查找值@之后的尾部，@jb51.net

Summary:

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