Web Design and Programming Pt 8 Regex
In this video I’ll continue to show you how to retrieve specific information using Regular Expressions and PHP. I’ll specifically cover how to find:
- Email Addresses
- Phone Numbers
- Dates
- Validated Passwords
- And other more complicated Regular Expressions
You definitely should watch part 1 of this tutorial here PHP Regular Expressions, before you proceed. Regular expressions work nearly the same with all languages. The only main difference is the methods or functions that locate them. If you watch the videos you’ll better understand what I mean.
The first part of this whole tutorial is available here Web Design and Programming. If you have any questions or comments leave them below. Like always the code follows the video and you can use it in any way.
Code from the Video
<html>
<head>
<title><?php echo “Regular Expressions”;?></title>
</head>
<body>
<?php
$randomArray = array(“Derek”,”123 Main St.”,”PA”,”12345″,”(412)-537-5555″,
“12/12/1974″,”dbanas123@gmail.com”,”$1,234″,”Turtle3Dove”,”123-45-6789″,”p* 1 “,
“<p>Random Text</p>”, “Mailman”, “Mailwoman”, “Jennifer”, “Jenny”, “Jen”, “Doctor”, “Doug”, “Dog”);
$emailArray = preg_grep(“%[A-Za-z0-9._\%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}%”, $randomArray);
foreach($emailArray as $result)
{
echo $result, “<br /><br />”;
}
$phoneArray = preg_grep(“%\(?[0-9]{3}\)?-?[0-9]{3}[-. ]?[0-9]{4}%”, $randomArray);
foreach($phoneArray as $result)
{
echo $result, “<br /><br />”;
}
# ? – Occurs zero or one time
# / @ # ` ~ % & ‘ ” – All possible delimiters
$dateArray = preg_grep(“%(0?[1-9]|[12][0-9]|3[01])[- /.](0?[1-9]|[12][0-9]|3[01])[- /.](19|20)?[0-9]{2}%”, $randomArray);
foreach($dateArray as $result)
{
echo $result, “<br /><br />”;
}
$passwordArray = preg_grep(‘%\A(?=[-_a-zA-Z0-9]*?[A-Z])(?=[-_a-zA-Z0-9]*?[a-z])(?=[-_a-zA-Z0-9]*?[0-9])\S{6,}\z%’, $randomArray);
foreach($passwordArray as $result)
{
echo $result, “<br />”;
}
# (?=) – Match what proceeds equals if what follows equals matches
$mailArray = preg_grep(“%mail(?!woman)%i”, $randomArray);
foreach($mailArray as $result)
{
echo $result, “<br />”;
}
# (?!) – Match what proceeds if what follows doesn’t match
$manArray = preg_grep(“%(?<=mail)woman%i”, $randomArray);
foreach($manArray as $result)
{
echo $result, “<br />”;
}
?>
</body>
</html>