php preg_match email validation code
<?php
function checkemail($str) {
return (!preg_match("/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix", $str)) ? FALSE : TRUE;
}
if(!checkemail("[email protected]")){
echo "Invalid email address.";
}
else{
echo "Valid email address.";
}
?>regex for email php
<?php
$pattern = '/^(?!(?:(?:\\x22?\\x5C[\\x00-\\x7E]\\x22?)|(?:\\x22?[^\\x5C\\x22]\\x22?)){255,})(?!(?:(?:\\x22?\\x5C[\\x00-\\x7E]\\x22?)|(?:\\x22?[^\\x5C\\x22]\\x22?)){65,}@)(?:(?:[\\x21\\x23-\\x27\\x2A\\x2B\\x2D\\x2F-\\x39\\x3D\\x3F\\x5E-\\x7E]+)|(?:\\x22(?:[\\x01-\\x08\\x0B\\x0C\\x0E-\\x1F\\x21\\x23-\\x5B\\x5D-\\x7F]|(?:\\x5C[\\x00-\\x7F]))*\\x22))(?:\\.(?:(?:[\\x21\\x23-\\x27\\x2A\\x2B\\x2D\\x2F-\\x39\\x3D\\x3F\\x5E-\\x7E]+)|(?:\\x22(?:[\\x01-\\x08\\x0B\\x0C\\x0E-\\x1F\\x21\\x23-\\x5B\\x5D-\\x7F]|(?:\\x5C[\\x00-\\x7F]))*\\x22)))*@(?:(?:(?!.*[^.]{64,})(?:(?:(?:xn--)?[a-z0-9]+(?:-+[a-z0-9]+)*\\.){1,126}){1,}(?:(?:[a-z][a-z0-9]*)|(?:(?:xn--)[a-z0-9]+))(?:-+[a-z0-9]+)*)|(?:\\[(?:(?:IPv6:(?:(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){7})|(?:(?!(?:.*[a-f0-9][:\\]]){7,})(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,5})?::(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,5})?)))|(?:(?:IPv6:(?:(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){5}:)|(?:(?!(?:.*[a-f0-9]:){5,})(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,3})?::(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,3}:)?)))?(?:(?:25[0-5])|(?:2[0-4][0-9])|(?:1[0-9]{2})|(?:[1-9]?[0-9]))(?:\\.(?:(?:25[0-5])|(?:2[0-4][0-9])|(?:1[0-9]{2})|(?:[1-9]?[0-9]))){3}))\\]))$/iD';
$emailaddress = '[email protected]';
if (preg_match($pattern, $emailaddress) === 1) {
// emailaddress is valid
}php check regular string
//You should use a regex filter with preg_match who returns 1 or 0
// this filter works for most of cases
/* use this regex */ preg_match("/^[a-z ,.'-]+$/i", your_string);
if you want more regex filters you can make yours on 'https://regex101.com/'regex validation of name in php
case 3:
$rgx = "/^[A-Z0-9._%+-]+@[A-Z0-9.-]+.[A-Z]{2,4}$/i";
break;
case 2:
//read below
$rgx = "/[^A-Za-z0-9]+/";
break;
case 1:
//read below
$rgx = "/[^A-Za-z0-9]+/";
break;
case 0:
//if characters are NOT normal
$rgx = "/[^A-Za-z0-9]+/";
break;
default:
echo "???";
die("$unit ?");
break;
}
$n = preg_match($rgx, $unit, $matches);
if ( ($idx == 0) || ($idx == 1) || ($idx == 2) ){
if ($n) {
echo "Bad Characters in $unit; Alphanumeric only";
}
} else {
if ($n == 0) {
echo "Incorrect Format in $unit; Enter Valid Info";
}
}Copyright © 2021 Codeinu
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