Find characters in php string_PHP tutorial

What this article is going to talk about is using the strstr and strpos functions to query whether there is the character content we want in the specified string. You can refer to it if you need it.

The strstr() function is used to obtain the substring from the first occurrence of a specified string in another string to the end of the latter. If the execution is successful, it returns the remaining string (matching characters exist); If no matching character is found, false is returned.
Syntax:
string strstr(string haystack,string needle)
Parameter haystack: necessary parameter, specify which string to search from.
Parameter needle: necessary parameter, specifying the search object. If the argument is a numeric value, then a search is performed for characters that match the ASCII value of the numeric value.
Example:

Grammar

The code is as follows

代码如下	复制代码
echo strstr(“明日编程词典”,”编”); //输出查询的字符串 echo “ ”;                      //执行回车 echo strstr(“www.111c.net”,”111”);  //输出查询的字符串（从第一个m取值） echo “ ”;                         //执行回车 echo strstr(“0431-84972266″,”8″);    //输出查询的字符串 ?>

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echo strstr("Tomorrow's Programming Dictionary","Editor"); //Output the query string echo “
”; //Execute carriage return

echo strstr("www.111c.net","111"); //Output the query string (value from the first m)

echo “
”; //Execute carriage return

echo strstr(“0431-84972266″,”8″); //Output the query string
?>




Definition and Usage
The strpos() function returns the position of the first occurrence of a string within another string.

代码如下	复制代码
echo strpos("Hello world!","wo"); ?>输出： 6

If the string is not found, return false.

strpos(string,find,start) parameter description string required. Specifies the string to be searched for.

find required. Specifies the characters to search for.

start is optional. Specifies the location from which to start the search. Tips and Notes Note: This function is case sensitive. For case-insensitive searches, use the stripos() function. Example

The code is as follows

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echo strpos("Hello world!","wo"); ?>Output: 6 http://www.bkjia.com/PHPjc/631320.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/631320.htmlTechArticleWhat this article is going to talk about is using the strstr and strpos functions to query whether there are the characters we want in the specified string. Content, you can refer to it if necessary. The strstr() function is used to get a pointer...