php strstr() strrchr() strpos() strrpos() function_PHP tutorial

These four functions are character operation functions, which mainly determine the number of times a character appears. Friends in need can refer to it.

The code is as follows

代码如下

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//strstr:从左向右查找 返回值：字符串 //strrchr:从右向左查找 返回值：字符串 //strpos:从左向右查找 返回值：整型，假如查找的字符串不存在，则返回空 //strrpos:从右向左查找 返回值：整型 $str="天高任鸟飞，海阔凭鱼跃";//strstr:从左向右查找 strrchr:从右向左查找 echo "原始字符串：".$str." "; echo "用strstr函数搜索“，”的返回结果：".strstr($str,"，")." "; echo "用strstr函数搜索“鸟飞”的返回结果：".strstr($str,"鸟飞")." "; $str1="I have a great dream."; echo "原始字符串:".$str1." "; echo "用strrchr函数搜索“e”的返回结果：".strrchr($str1,"e")." "; echo "用strrchr函数搜索“ea”的返回结果：".strrchr($str1,"ve")." "; $str2="I am an abstract about abroad."; echo "原始字符串为：".$str2." "; echo "ab在字符串中的第一次出现位置为：".strpos($str2,"ab")." "; echo "ab在字符串中的第一次出现位置为：".strpos($str2,"am")." "; echo "abcd在字符串中第一次出现的位置为：".strpos($str2,"aman")." "; $str3="I am is wang hui."; echo "原始字符串为：".$str3." "; echo "I在字符串中的最后一次出现位置为：".strrpos($str3,"I")." "; echo "an在字符串中的最后一次出现位置为：".strrpos($str3,"an")." "; echo "i在字符串中最后一次出现的位置为：".strrpos($str3,"i"); ?>

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//strstr: Search from left to right Return value: string
//strrchr: Search from right to left Return value: string
//strpos: Search from left to right. Return value: integer. If the searched string does not exist, it will return empty
//strrpos: Search from right to left Return value: integer
$str="The sky is high enough for birds to fly, and the sea is wide enough for fish to jump";//strstr: Search from left to right strrchr: Search from right to left
echo "Original string: ".$str."
";
echo "The return result of searching for "," using strstr function: ".strstr($str,",")."
";
echo "The return result of searching for "bird flying" using strstr function:".strstr($str,"鸟飞")."
";

$str1="I have a great dream.";
echo "Original string:".$str1."
";
echo "The return result of searching for "e" using strrchr function: ".strrchr($str1,"e")."
";
echo "The return result of searching for "ea" using strrchr function: ".strrchr($str1,"ve")."
";

$str2="I am an abstract about abroad.";
echo "The original string is: ".$str2."
";
echo "The first occurrence of ab in the string is: ".strpos($str2,"ab")."
";
echo "The first occurrence of ab in the string is: ".strpos($str2,"am")."
";
echo "The first occurrence of abcd in the string is: ".strpos($str2,"aman")."
"; $str3="I am is wang hui.";
echo "The original string is: ".$str3."
";
echo "The last occurrence of I in the string is: ".strrpos($str3,"I")."
";
echo "The last occurrence of an in the string is: ".strrpos($str3,"an")."
";
echo "The last occurrence of i in the string is: ".strrpos($str3,"i"); ?>

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www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/631322.htmlTechArticleThese four functions are character operation functions, mainly to determine the number of times a character appears. Friends in need can refer to it. . The code is as follows Copy code ?php //strstr: Search from left to right Return...