Email regex
deze pagina is de volgende regex de enige correcte voor het valideren van emailadressen:
Aardig droog
Volgens Code (php)
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?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>
@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*(?:,@(?:(?:\r\n)?[
\t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,
;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t]
)*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\
".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*)*:(?:(?:\r\n)?[ \t])*)?
(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".
\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:(?:
\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\[
"()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])
*))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])
+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\
.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z
|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*\>(?:(
?:\r\n)?[ \t])*))*)?;\s*)
Aardig droog
Paul Warren 13/4/2002
Klinkt als: oud
voetnoten genoemd.
Volgens wikipedia zijn er verschillende RFCs voor emailadressen. Deze gaat over de meest complexe en wordt ook bij de Verder komt het er op neer, dat je zo'n grote regex moet hebben dat het performance-wise slechter is om zoiets te gebruiken. Je kunt gewoon veel beter kijken of er tekst voor de @ is, een @ is tekst na de @, een laatste punt en daarna ook nog weer tekst.
Verder is het natuurlijk vrij onverstandig om dit te gebruiken. Grappig is het wel dat, mocht dit de best mogelijke regex zijn, die email RFC bizar complex is.
Toevoeging op 16/04/2011 11:23:30:
Ook staat deze regex trouwens adressen toe die volgens de RFC mogen, maar niet ondersteund worden door de mail-infrastructuur.
Leuke opdracht om aan een beginner te geven: verklaar is deze code. Wedden dat hij het probeert?
Pff.. Kost even wat voorbereiding om dit zo te schrijven.. :)
Sowieso als je deze in een tree probeert uit te schrijven ben je al even een pagina of 30 verder...
Nog niet gesproken over het lezen ervan.. :) Zeker voor zo'n regex fan die ik ben (but not heus).
Het is een mooie uitdaging logisch denken. Wel kan ik me leukere dingen voorstellen...
antiek
Is het emailprotocol veranderd dan?
Nogal een onzinnige opmerking.
Trouwens, het zou een geweldige grap zijn als met 5% van deze regex emailadressen worden gevalideerd en dat hij de rest heeft toegevoegd om cool te lijken. Niemand zou het doorhebben. xD
Gewijzigd op 16/05/2011 20:54:05 door Pim -
Deze regex slaat nergens op. Hij herhaalt steeds zijn eigen code, sommige stukken zijn 12x te vinden.
Toch wel iemand Pim.. ;)