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You can use preg_replace in this case; $res = preg_replace("/[^0-9]/", "", "Every 6 Months" );
The substr() and strpos() function is used to remove portion of string after certain character. strpos() function: This function is used to find the first occurrence position of a string inside another string. Function returns an integer value of position of first occurrence of string.
$result = preg_replace("/[^a-zA-Z0-9]+/", "", $s);
Try this:
preg_replace('/[^0-9]/', '', '604-619-5135');
preg_replace uses PCREs which generally start and end with a /.
This is for future developers, you can also try this. Simple too
echo preg_replace('/\D/', '', '604-619-5135');
You would need to enclose the pattern in a delimiter - typically a slash (/) is used. Try this:
echo preg_replace("/[^0-9]/","",'604-619-5135');
a much more practical way for those who do not want to use regex:
$data = filter_var($data, FILTER_SANITIZE_NUMBER_INT);
note: it works with phone numbers too.
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