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Mac address regex PHP

Mac address is a unique identifier assigned to network interface controllers like WiFi routers, Ethernet controllers, etc. It has a format of six groups of 2 hexadecimal digits separated by dash or colon (e.g. 00:00:5e:00:53:af). Mac address regular expression can be used to validate that a certain string contains mac address or extract mac address from a given string.

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Simple Mac address regex (IEEE 802)

Below is a simple mac address regex that supports dashes or colons as separators:

"/^(?:[0-9A-Fa-f]{2}[:-]){5}(?:[0-9A-Fa-f]{2})$/"
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/^(?:[0-9A-Fa-f]{2}[:-]){5}(?:[0-9A-Fa-f]{2})$/

True

False

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Example code in Python:

// Validate mac address
$mac_address_validation_regex = "/^(?:[0-9A-Fa-f]{2}[:-]){5}(?:[0-9A-Fa-f]{2})$/"; 
echo preg_match($mac_address_validation_regex, '00:00:5e:00:53:af'); // returns 1

// Extract mac addresses from a string
$extract_mac_addresses_pattern = "/(?:[0-9A-Fa-f]{2}[:-]){5}(?:[0-9A-Fa-f]{2})/"; 
$string_to_match = 'Unknown error in node 00:00:5e:00:53:af. Terminating.';
preg_match_all($extract_mac_addresses_pattern, $string_to_match, $matches);
print_r($matches[0]) // matches[0] is ['00:00:5e:00:53:af']
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True

False

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Test it!

True

False

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