Php script for validating email address

21-Feb-2017 08:00

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Several approaches can be taken to address the problem, depending on the level of complexity desired for the validation itself.If the application is going to make use of a basic level of validation, a quick-and-dirty way to handle the situation might be to implement a simple PHP function that performs pattern matching to a standardized email address format, as we have seen many times.The process will show the power of some interesting PHP built-in network functions, as well as demonstrate how to reduce noticeably the possibilities of dirtying our applications with user-supplied bogus email.The first step to validating an email address is to check whether it is in the standard format.My mail form is still sending emails even if the email address is not valid.For example, if I fill in the email as "bob", and hit submit, my javascript validator gives a warning message, but the email still goes through.

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Front end to prevent unnecessary hits to the server and to provide more effective and prompt feedback, and back end to catch anything that the Front-end lets through (since it can be bypassed) My script of choice for the front end is j Query Ketchup On the back-end, filter_var works fine, as does regex if you're working with an older version of PHP. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).In our case, we need to look for MX records according to the host provided within the email address.Therefore, it‘s pretty easy to code a new function, which will take care of checking the existence of the corresponding MX entries for a given host.Let’s write the function to do that: The above function accepts a string as an email parameter for checking whether it fits the proper format, and whether the domain is real.

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In order to obtain the domain part, we split the email address into the username and domain sections, respectively, using the PHP’s split() function, as listed below: Now, the $domain variable stores the corresponding domain.

It has the following format: The function accepts the following types of records: A, MX, NS, SOA, PTR, CNAME, or ANY, with MX (Mail Exchange) as the default type.