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<h1>Regex Modifier: .</h1>
<p>How many occurrences of ANY character or digit are in the text "W3Schools has been live since 1999.":</p>
$txt = "W3Schools has been live since 1999.";
$pattern = "/./";
echo preg_match_all($pattern, $txt);
<p>The matches were found here:</p>
echo preg_replace($pattern, "#", $txt);
<p>(Each match was replaced by a # character)</p>
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How many occurrences of ANY character or digit are in the text "W3Schools has been live since 1999.":
35The matches were found here:
###################################(Each match was replaced by a # character)