function cnSubStr($string,$sublen) { if($sublen>=strlen($string)) { return $string; } $s=""; for($i=0;$i<$sublen;$i++) { if(ord($string{$i})>127) { $s.=$string{$i}.$string{++$i}; continue; }else{ $s.=$string{$i}; continue; } } return $s; }// End Functio...
您可以简单地从字符串末尾的偏移量替换字符串的部分(-1 2-9表示数字,3表示空格、连字符和空格) So $string = 'My name is George 123123123'; $string = substr_replace($string, ' - ', -12, 3); echo $string; gives My name is Geor - 123123123...
$str = “Hello World”;$substring = substr($str, 6, 5);echo $substring; // 输出:World“` 4. 字符串查找和替换:可以使用strpos()函数查找子字符串在字符串中的位置,使用str_replace()函数进行字符串替换。例如: “`php$str = “Hello World”;$pos = strpos($str, “World”);echo $pos; //...
...AAAAABBAAA"; String b="B"; int count= (res.length()-res.replace(b,"").length())/b.length(); 原理很简单,用空格代替特定字符...,然后计算与以前字符串的长度差,再除以 特定字符的长度,即可得出A中所占b的个数。...=0; while (res.contains(b)){ res=res.substring(res.indexOf(...
substr_count — Count the number of substring occurrences substr_replace — Replace text within a portion of a string substr — Return part of a string trim — Strip whitespace (or other characters) from the beginning and end of a string ...
To find the index of a substring in a string in PHP, call strpos() function and pass given string and substring as arguments. The strpos() function returns an integer value of the index if the substring is present in the string, else, the function return
string implode ( string $glue , array $pieces ) substr() 截取字符串 string substr ( string $string , int $start [, int $length ] ) str_replace() 字符串替换操作,区分大小写 mix str_replace(mix $search,,mix $replace,mix $subject[,int &$num]) str_ireplace() 字符串替换操作,不区分大...
The position of World in the string is: 7 3. substr() 函数 substr() 函数用于在字符串中获取指定位置和长度的子串。示例代码如下: ```php $str = Hello, World!; $sub = substr($str, 7, 5); echo The substring is: . $sub; ``` ...
string $string [, int $limit = PHP_INT_MAX ] ) //Returns an array of strings, each of which is a substring of string formed by splitting it on boundaries formed by the string delimiter. //此函数返回由字符串组成的数组,每个元素都是 string 的一个子串,它们被字符串 delimiter 作为边界点分...
(column) 把存储的字符串全部小写 SUBSTRING() SUBSTRING(column, start, length) 从column中返回开始start的length个字符(索引从0开始) MD5() MD5(column) 把储存的字符串用MD5加密 SHA() SHA(column) 把存储的字符串用SHA加密 数字函数函数 用法 描述 ABS() ABS(x) 返回x的绝对值 CEILING() CEILING(x) ...