substr()php
<?php
echo substr('abcdef', 1); // bcdef
echo substr('abcdef', 1, 3); // bcd
echo substr('abcdef', 0, 4); // abcd
echo substr('abcdef', 0, 8); // abcdef
echo substr('abcdef', -1, 1); // f
// Accessing single characters in a string
// can also be achieved using "square brackets"
$string = 'abcdef';
echo $string[0]; // a
echo $string[3]; // d
echo $string[strlen($string)-1]; // f
?>
//substr() function returns certain bits of a string
获取字符串php的最后一个字符
substr("testers", -1); // returns "s"
php获取字符串的第一个字符
$firstStringCharacter = substr("hello", 0, 1);
php获取字符串的前5个字符
$result = substr("Hello How are you", 0, 5); //first 5 chars "Hello"
取后四位数字
$newstring = substr($dynamicstring, -7);
字符串php的名字
$words = explode(" ", $string);
$firstname = $words[0];
$lastname = $words[1];
$third_word = $words[2];