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What type of regex should be used to match a md5 hash.
how to validate this type of string 00236a2ae558018ed13b5222ef1bd987
i tried something like this: ('/^[a-z0-9]/') but it didnt work.
how to achieve this? thanks
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Type the following command: md5sum [type file name with extension here] [path of the file] -- NOTE: You can also drag the file to the terminal window instead of typing the full path. Hit the Enter key. You'll see the MD5 sum of the file. Match it against the original value.
You can check using the following function: function isValidMd5($md5 ='') { return preg_match('/^[a-f0-9]{32}$/', $md5); } echo isValidMd5('5d41402abc4b2a76b9719d911017c592'); The MD5 (Message-digest algorithm) Hash is typically expressed in text format as a 32 digit hexadecimal number.
Short for regular expression, a regex is a string of text that lets you create patterns that help match, locate, and manage text. Perl is a great example of a programming language that utilizes regular expressions. However, its only one of the many places you can find regular expressions.
This is a PCRE that will match a MD5 hash:
define('R_MD5_MATCH', '/^[a-f0-9]{32}$/i'); if(preg_match(R_MD5_MATCH, $input_string)) { echo "It matches."; } else { echo "It does not match."; } Try ctype_xdigit:
<?php $hash = '00236a2ae558018ed13b5222ef1bd987'; var_dump(strlen($hash) === 32 && ctype_xdigit($hash)); Output: bool(true)
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