PHP Regular Expression Örnekleri

1- E-Posta Adresi:

$email="test@example.com";
if(preg_match('/^[^0-9][a-zA-Z0-9_]+([.][a-zA-Z0-9_]+)*[@][a-zA-Z0-9_]+([.][a-zA-Z0-9_]+)*[.][a-zA-Z]{2,4}$/',$email)){
echo"Your email is ok.";
}
else{
echo"Wrong email address format";
}

if(filter_var('test+email@fexample.com', FILTER_VALIDATE_EMAIL)){
echo"Your email is ok.";}else{echo"Wrong email address format.";
}

2- Kullanıcı Adı:

$username="user_name12";
if(preg_match('/^[a-z\d_]{5,20}$/i',$username)){
echo"Your username is ok.";
}else{
echo"Wrong username format.";
}

3- Telefon Numarası:

$phone="(021)423-2323";if(preg_match('/\(?\d{3}\)?[-\s.]?\d{3}[-\s.]\d{4}/x',$phone)){
echo"Your phone number is ok.";
}else{
echo"Wrong phone number.";
}

4- IP Adresi:

$IP="198.168.1.78";
if(preg_match('/^(([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]).){3}([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$/',$IP)){
echo"Your IP address is ok.";
}else{
echo"Wrong IP address.";
}

5- Posta Kodu:

$zipcode="12345-5434";
if(preg_match("/^([0-9]{5})(-[0-9]{4})?$/i",$zipcode)){
echo"Your Zip code is ok.";
}else{
echo"Wrong Zip code.";
}

6- Sosyal Güvenlik Numarası:

$ssn="333-23-2329";
if(preg_match('/^[\d]{3}-[\d]{2}-[\d]{4}$/',$ssn)){
echo"Your SSN is ok.";
}else{
echo"Wrong SSN.";
}

7- Kredi Kartı Numarası:

$cc="378282246310005";
if(preg_match('/^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6011[0-9]{12}|3(?:0[0-5]|[68][0-9])[0-9]{11}|3[47][0-9]{13})$/',$cc)){
echo"Your credit card number is ok.";
}else{
echo"Wrong credit card number.";
}

8- Domain:

$url="http://komunitasweb.com/";
if(preg_match('/^(http|https|ftp):\/\/([A-Z0-9][A-Z0-9_-]*(?:\.[A-Z0-9][A-Z0-9_-]*)+):?(\d+)?\/?/i',$url)){
echo"Your url is ok.";
}else{
echo"Wrong url.";
}

9- URL:

$url="http://komunitasweb.com/index.html";
preg_match('@^(?:http://)?([^/]+)@i',$url,$matches);
$host=$matches[1];
echo $host;

10- Highlight:

$text="Sample sentence from KomunitasWeb, regex has become popular in web programming. Now we learn regex. According to wikipedia, Regular expressions (abbreviated as regex or regexp, with plural forms regexes, regexps, or regexen) are written in a formal language that can be interpreted by a regular expression processor";
$text=preg_replace("/\b(regex)\b/i",'<span style="background:#5fc9f6">\1</span>',$text);
echo $text;

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