mb_ereg_search_getpos

Function name: mb_ereg_search_getpos()

Function description: Get the matching position of the current regular expression

Applicable version: PHP 4 >= 4.2.0, PHP 5, PHP 7

Syntax: mb_ereg_search_getpos()

Return value: Return an integer indicating the matching position of the current regular expression; if there is no match or an error occurs, return FALSE.

Description: The mb_ereg_search_getpos() function is used to get the matching position of the current regular expression. This function can correctly return the matching position when using a multibyte character set.

Notes:

• Before using the mb_ereg_search_getpos() function, you must first execute the mb_ereg_search_init() function to initialize the regular expression engine.
• The mb_ereg_search_getpos() function must be called after the mb_ereg_search_regs() function, otherwise FALSE will be returned.

Example:

 // 初始化正则表达式引擎mb_regex_encoding("UTF-8"); mb_ereg_search_init("(\d+)", "这是123个苹果和456个橘子"); // 执行正则表达式匹配if (mb_ereg_search()) { // 获取匹配位置$position = mb_ereg_search_getpos(); echo "匹配位置：$position"; // 输出：匹配位置：6 } else { echo "未找到匹配"; }

In the example above, we first set the character set to UTF-8 using the mb_regex_encoding() function, and then use the mb_ereg_search_init() function to initialize the regular expression engine and specify the string and regular expression to match. Next, we call the mb_ereg_search() function to perform regular expression matching. If the match is successful, we use the mb_ereg_search_getpos() function to get the matching position and output it. In this example, the regular expression (\d+) matches the number 123 in the string, with its position 6.