🔴 Advanced · Lesson 30
Regular Expressions
Regular Expressions
What is Regex?
Regular expressions (regex) are patterns to search, match and replace text. PHP uses
preg_match() and preg_replace().preg_match (does it match?)
$email = "test@site.com";
if (preg_match("/^[\w.]+@[\w.]+\.\w+$/", $email)) {
echo "Valid email";
} // Valid emailpreg_replace (find and replace)
$text = "Call me at 99999-88888";
$clean = preg_replace("/[0-9]/", "*", $text);
echo $clean; // Call me at *****-*****Common Patterns
| Pattern | Matches |
|---|---|
| \d | a digit |
| \w | letter/digit/_ |
| + | one or more |
| * | zero or more |
Summary
- Regex matches/replaces text patterns; use preg_match and preg_replace.
- \d = digit, \w = word char, + = one or more.
Regex क्या है?
Regular expressions (regex) text को search, match और replace करने के patterns हैं। PHP
preg_match() और preg_replace() use करता है।preg_match (match होता है क्या?)
$email = "test@site.com";
if (preg_match("/^[\w.]+@[\w.]+\.\w+$/", $email)) {
echo "Valid email";
} // Valid emailpreg_replace (find और replace)
$text = "Call me at 99999-88888";
$clean = preg_replace("/[0-9]/", "*", $text);
echo $clean; // Call me at *****-*****Common Patterns
| Pattern | Matches |
|---|---|
| \d | digit |
| \w | letter/digit/_ |
| + | एक या ज़्यादा |
| * | zero या ज़्यादा |
सारांश
- Regex text patterns match/replace करता है; preg_match और preg_replace use करें।
- \d = digit, \w = word char, + = एक या ज़्यादा।