Php/docs/function.str-contains
str_contains
(PHP 8)
str_contains — Determine if a string contains a given substring
说明
str_contains
( string $haystack
, string $needle
) : bool
Performs a case-sensitive check indicating if needle is contained
in haystack.
参数
haystack- The string to search in.
needle- The substring to search for in the
haystack.
返回值
Returns true if needle is in
haystack, false otherwise.
范例
Example #1 Using the empty string
<?phpif (str_contains('abc', )) { echo "Checking the existence of the empty string will always return true";}?>
以上例程会输出：
Checking the existence of the empty string will always return true
Example #2 Showing case-sensitivity
<?php$string = 'The lazy fox jumped over the fence';if (str_contains($string, 'lazy')) { echo "The string 'lazy' was found in the string\n";}if (str_contains($string, 'Lazy')) { echo 'The string "Lazy" was found in the string';} else { echo '"Lazy" was not found because the case does not match';}?>
以上例程会输出：
The string 'lazy' was found in the string "Lazy" was not found because the case does not match
注释
Note: 此函数可安全用于二进制对象。
参见
- str_ends_with() - Checks if a string ends with a given substring
- str_starts_with() - Checks if a string starts with a given substring
- stripos() - 查找字符串首次出现的位置（不区分大小写）
- strrpos() - 计算指定字符串在目标字符串中最后一次出现的位置
- strripos() - 计算指定字符串在目标字符串中最后一次出现的位置（不区分大小写）
- strstr() - 查找字符串的首次出现
- strpbrk() - 在字符串中查找一组字符的任何一个字符
- substr() - 返回字符串的子串
- preg_match() - 执行匹配正则表达式
