This is a way to sanitize a string to be used as file name or URL path etc. by removing unwanted characters or replacing them with a hyphen or similar.
It takes a string like:
Daily SimpliVity Backup 12/16/2018 02:00:215
and converts it into:
daily-simplivity-backup-12-16-2018-02-00-25
This is how you can match a order number with leading characters, in this case "OF", followd by 6 numbers, in a condition (IF), for instance "OF123456"
This is how you can match a numeric string with a hyphen at a specific position and use it in a condition (IF), for instance "12345-01".
If you want to remove all characters from a string using ascii range, this is one setup you can use. To modify see the HEX ascii values in this ascii table.
This is how to extract a sub string within a string by apostrophes.
This is how to extract a sub string within a string by brackets or parentheses.
Get the URL anchor text from a link
By including the Simple HTML Dom library you can extract any HTML element and get their attributes. This is how to get the charset from the meta tag element. The function _get_html_charset() will return "utf-8".
This is how you can remove line breaks and carriage return from a string.
<?php
$string = trim( preg_replace( '/\s+/', ' ', $string ) );
?>This is how you can remove empty places in a comma separated list e.g when you have a list like "one, , two, , three, , " and you want it to look like "one, two, three"
<?php
$input = "one, , , two, ";
//$input = ", two, two, ";
//$input = ", two, two";
$input = preg_replace( "/, , |, $|^, /", "", $input);
echo $input;
?>