php extract UK postal code and validate it
I have some text blocks like
John+and+Co-Accountants-Hove-BN31GE-2959519
I need a function to extract the postcode "BN31GE". It may happen to not exist and have a text block without postcode so the function must also validate if 开发者_如何学编程the extracted text is valid postcode .
John+and+Co-Accountants-Hove-2959519
The UK Government Data Standard for postcodes is:
((GIR 0AA)|((([A-PR-UWYZ][0-9][0-9]?)|(([A-PR-UWYZ][A-HK-Y][0-9][0-9]?)|(([A-PR-UWYZ][0-9][A-HJKSTUW])|([A-PR-UWYZ][A-HK-Y][0-9][ABEHMNPRVWXY])))) [0-9][ABD-HJLNP-UW-Z]{2}))
Edit: I had the above in some (personal) code with a reference to a now non-existence UK government web page. The appropriate British Standard is BS7666 and information on this is currently available here. That lists a slightly different regex.
Find below code to extract valid UK postal code. It return array if post code found otherwise empty.
<?php
$getPostcode="";
$str="John+and+Co-Accountants-Hove-BN31GE-2959519";
$getArray = explode("-",$str);
if(is_array($getArray) && count($getArray)>0) {
foreach($getArray as $key=>$val) {
if(preg_match("/^(([A-PR-UW-Z]{1}[A-IK-Y]?)([0-9]?[A-HJKS-UW]?[ABEHMNPRVWXY]?|[0-9]?[0-9]?))\s?([0-9]{1}[ABD-HJLNP-UW-Z]{2})$/i",strtoupper($val),$postcode)) {
$getPostcode = $postcode[0];
}
}
}
print"<pre>";
print_r($getPostcode);
?>
Use a regex: preg_grep function,
I don't know the format of english postcodes but you could go with something like:
(-[a-zA-Z0-9]+-)+
This matches
- "-Accountants-"
- "-BN31GE-"
You can then proceed at taking always the second value or you can enhance you regex to match exactly english postcodes, something like maybe
([A-Z0-9]{6})
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