$str = 'https://example.com/tools/onphp.html';
echo strpos($str,'/',0); //return 6
echo strpos($str,'/',1); //return 6
echo strpos($str,'/',2); //return 6
echo strpos($str,'/',3); //return 6
in php 7.3
why is the result returned 6666
i want get result is ‘https://www.example.com/’ use substr($str,0,strpos($str,'/',2));
but it can not working
now i’m use
preg_replace('/^([\s\S]*?)\/\/([\s\S]*?)\/([\s\S]*?)$/','\1//\2',$str);
so is there a simpler solution ?
>Solution :
According to the PHP docs:
strpos(string $haystack, mixed $needle, int $offset = 0): int
offset: If specified, search will start this number of characters
counted from the beginning of the string. If the offset is negative,
the search will start this number of characters counted from the end
of the string.return: the position of where the needle exists relative to the beginning of the haystack string (independent of offset). Also note
that string positions start at 0, and not 1.
When you are calling strpos('https://example.com/tools/onphp.html','/',3), the search starts from the character at index 3, which is 'p'
// start - |
strpos('https://example.com/tools/onphp.html', '/', 0); //returns 6
If you are trying to find the nth occurence of a string, you can refer to this question