Regular Expressions

$text = "I love PHP!";
if (preg_match("/php/i", $text)) {
    echo "نعم، الكلمة موجودة!";
}

ereg() و eregi() // تم حذفها منذ PHP 7

$string = "Email: [email protected]";
if (preg_match("/\w+@\w+\.\w+/", $string)) {
    echo "يوجد بريد إلكتروني";
}

$text = "PHP, HTML, CSS, JavaScript";
preg_match_all("/\w+/", $text, $matches);
print_r($matches);

$text = "أنا أحب PHP";
echo preg_replace("/PHP/", "Laravel", $text); // الناتج: أنا أحب Laravel

$data = "apple,orange,banana";
$parts = preg_split("/,/", $data);
print_r($parts);

$fruits = ["apple", "orange", "banana"];
$result = preg_grep("/a/", $fruits);
print_r($result); // فقط التي تحتوي على حرف a

"/pattern/modifiers"

"/php/i" // نمط يبحث عن php بأي حالة

preg_match("/\bphp\b/", "I love php!") // تطابق صحيح
</code>

preg_match("/(\d+)-(\w+)/", "123-test", $matches);
print_r($matches);
/*
[0] => 123-test
[1] => 123
[2] => test
*/

$email = "[email protected]";
if (preg_match("/^[\w\.-]+@[\w\.-]+\.\w+$/", $email)) {
    echo "بريد صحيح";
}

preg_match("/^01[0-2][0-9]{8}$/", "01234567890");

$text = "@admin @user guest";
preg_match_all("/(?<=@)\w+/", $text, $matches);
print_r($matches);
/*
النتيجة:
[
  [0] => admin
  [1] => user
]
*/

$text = "100USD 200EUR 300USD 400TRY";
preg_match_all("/\d+(?!USD)/", $text, $matches);
print_r($matches);
/*
النتيجة:
[
  [0] => 200
  [1] => 400
]
*/

$text = "مرحبًا @yasin و @ali و ziad";
preg_match_all("/(?<=@)\w+/", $text, $matches);
print_r($matches);
/*
[
  [0] => yasin
  [1] => ali
]
*/

$text = "$100 200 €300";
preg_match_all("/(?<!\$)\d+/", $text, $matches);
print_r($matches);
/*
[
  [0] => 200
  [1] => 300
]
*/

$text = "الاسم: Yasin, العمر: 25";
preg_match("/الاسم:\s(?<name>\w+),\sالعمر:\s(?<age>\d+)/", $text, $matches);
echo "الاسم: " . $matches['name'] . "\n"; // Yasin
echo "العمر: " . $matches['age'];        // 25

$text = "hello hello world";<br>preg_match("/(\b\w+\b)\s+\1/", $text, $matches);<br>print_r($matches);<br>/*<br>[0] => hello hello<br>[1] => hello<br>*/<br>

$text = "Product: iPhone, Price: $999";
$pattern = "/Product:\s(?<product>\w+),\sPrice:\s\$(?<price>\d+)/";
preg_match($pattern, $text, $matches);
echo "المنتج: {$matches['product']}, السعر: {$matches['price']}";