$string = “This is a test string”; $substring = “test”; if (strpos($string, $substring) !== false) { echo “The string contains the substring.”; } else { echo “The string does not contain the substring.”; } “` 2. strstr函数:strstr函数用于在字符串中查找子字符串,并返回从...
$string = 'Hello, world!'; $substring = 'world'; if (str_contains($string, $substring)) { echo "The string contains the substring."; } else { echo "The string does not contain the substring."; } 复制代码 在上面的示例中,我们首先定义了一个包含字符串的变量$string和一个子字符串的变量...
echo “The string contains the substring.”; } else { echo “The string does not contain the substring.”; } “` 2. 操作流程如下: – 首先,定义一个包含指定字段的字符串,如$string = “This is a string contains substring”; – 然后,定义要判断的字段,如$substring = “contains”; – 使用...
Discover multiple methods for checking if a substring exists within a PHP string. Explore efficient techniques for substring detection now!
...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() Counts the number of times a substring occurs in a string substr_replace() Replaces a part of a string with another string trim() Removes whitespace or other characters from both sides of a string ucfirst() Converts the first character of a string to uppercase ucwords() Co...
)//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 作为边界点分割出来。
The function returns a part of a string. The first parameter is the specified string. The second parameter is the start of the substring. The third parameter is optional. It is the length of the returned substring. The default is to the return until the end of the string. ...
function custom_json_encode($data) { if (is_string($data)) { return '"' . addslashes($data) . '"'; } elseif (is_array($data)) { $result = []; foreach ($data as $key => $value) { $result[$key] = custom_json_encode($value); } return '{' . implode(',', $r...
The str_contains function checks whether a string is contained in another string. The str_starts_with and str_ends_with functions are used for determining if a string starts or ends with a specific substring. The 'str*' calls can be replaced with PHP 8 'str_*' calls inspection highlights...