genesisvh
asked on
Problem with regular expressions.
So this is the the third time posting this question, but this time I'm uploading the entire script. I'm still having problems. This is what I need:
I want a function to echo a message if a username does not pass my requirments.
- Only letters and / or numbers (No other characters)
- Must start with a letter (not a number)
- No spaces
The current code:
I want a function to echo a message if a username does not pass my requirments.
- Only letters and / or numbers (No other characters)
- Must start with a letter (not a number)
- No spaces
The current code:
//validate username with limited characters
}else if (!(eregi('/[a-Z][a-Z,0-9]/i,',($_POST["username"])))){
echo "<p> </p><p> </p><p> </p><br />Username must only contain numbers and letters. No spaces.<p> </p><p> </p><a href='javascript:javascript:history.go(-1)'>Click here to go back to previous page</a>";
<?php
$servername = "localhost";
$username = "";
$password = "";
//validate fields
if(!$_POST["username"] || !$_POST["email"] || !$_POST["password1"] || !$_POST["password2"]){
echo "<p> </p><p> </p><p> </p><br />Please fill the required fields, <p> </p><p> </p><a href='javascript:javascript:history.go(-1)'>Click here to go back to previous page</a>";
//validate password
}else if($_POST["password1"] != $_POST["password2"]){
echo "<p> </p><p> </p><p> </p><br />Please go back, PASSWORDS do not match! <p> </p><p> </p><a href='javascript:javascript:history.go(-1)'>Click here to go back to previous page</a>";
//validate password length
}else if(strlen($_POST["password1"]) < 6){
echo "<p> </p><p> </p><p> </p><br />Please go back, PASSWORD is too short! <p> </p><p> </p><a href='javascript:javascript:history.go(-1)'>Click here to go back to previous page</a>";
//validate username length
}else if(strlen($_POST["username"]) < 5){
echo "<p> </p><p> </p><p> </p><br />Please go back, USERNAME is too short! MUST BE BETWEEN 5 to 10 characters.<p> </p><p> </p><a href='javascript:javascript:history.go(-1)'>Click here to go back to previous page</a>";
//validate username with limited characters
}else if (!(eregi('/[a-Z][a-Z,0-9]/i,',($_POST["username"])))){
echo "<p> </p><p> </p><p> </p><br />Username must only contain numbers and letters. No spaces.<p> </p><p> </p><a href='javascript:javascript:history.go(-1)'>Click here to go back to previous page</a>";
//validate email
}else if(!(eregi("^.+@.+\\..+$", $_POST['email']))){
echo "<p> </p><p> </p><p> </p><br />Please enter a valid EMAIL! <a href='javascript:javascript:history.go(-1)'>Click here to go back to previous page</a>";
//validate captcha
}else if(($_SESSION['security_code'] != $_POST['security_code']) || (empty($_SESSION['security_code'])) ){
echo "<p> </p><p> </p><p> </p><br />CAPTCHA CODE does not match! <p> </p><p> </p><a href='javascript:javascript:history.go(-1)'>Click here to go back to previous page</a>";
}else{
$conn= mysql_connect($servername,$username,$password)or die(mysql_error());
mysql_select_db("",$conn);
// check if already registered
$sql_check = "SELECT * FROM users WHERE email = '".$_POST[email]."'";
$result_check = mysql_query($sql_check,$conn) or die(mysql_error());
$row = mysql_fetch_assoc($result_check);
if($row['id']){
echo "<p> </p><p> </p><p> </p><br />EMAIL already registered! <p> </p><p> </p><a href='javascript:javascript:history.go(-1)'>Click here to go back to previous page</a>";
}else{
// check if already registered
$sql_check = "SELECT * FROM users WHERE username = '".$_POST[username]."'";
$result_check = mysql_query($sql_check,$conn) or die(mysql_error());
$row = mysql_fetch_assoc($result_check);
if($row['id']){
echo "<p> </p><p> </p><p> </p><br />USERNAME already registered! <p> </p><p> </p><a href='javascript:javascript:history.go(-1)'>Click here to go back to previous page</a>";
}else{
// insert in db
$sql = "INSERT INTO users (username, email, password, company, phone, services) VALUES ('".mysql_real_escape_string($_POST[username])."', '".mysql_real_escape_string($_POST[email])."', '".mysql_real_escape_string($_POST[password1])."', '".mysql_real_escape_string($_POST[company])."', '".mysql_real_escape_string($_POST[phone])."', '".mysql_real_escape_string($_POST[services])."')";
$result = mysql_query($sql,$conn) or die(mysql_error());
$subject = "You have been registered with";
$headers4=""; ///// Change this address within quotes to your address ///
$headers.="Reply-to: $headers4\n";
$headers .= "From: $headers4\n";
$headers .= "Errors-to: $headers4\n";
$headers .= "Content-type: text/html\r\n";
$message = '<style type="text/css">
body {
background-color: #999;
}
</style>
<p><img src="" width="400" height="167"></p>
<p>THANK YOU!!!</p>
<p> <span style="color: #000">You have successfully registered </span><span style="font-size: 18px"><span style="color: #00F; font-weight: bold;"US</span><span style="color: #FFF">!</span></span></p>
<p><span style="color: #000"> If you need to contact us you can always reach us through the</span> <span style="color: #00F; font-weight: bold;">CONTACT US</span> <span style="color: #000">page. </span></p>';
mail( $_POST['email'], $subject, $message, $headers );
echo "<p> </p><p> </p><p> </p><br /><h1>You Have Successfully Registered</h1>";
echo "<p> </p><p> </p><br /><a href='main_login.php'>go to login page</a>";
}
}
}
?>
Last Comment
Just noticed another comma in the regex so try this instead
//validate username with limited characters
}else if (! preg_match('#[a-Z]{1}[a-Z0-9]+#i', $_POST["username"] ) ){
echo "<p> </p><p> </p><p> </p><br />Username must only contain numbers and letters. No spaces.<p> </p><p> </p><a href='javascript:javascript:history.go(-1)'>Click here to go back to previous page</a>";
Arrgggghhhhh!!!!! Not my day today. Don't mix cases like a-Z use A-Z or a-z. The 'i' after the closing # will make the expression case insensitive.
Sorry for so many corrections...... :-(
Sorry for so many corrections...... :-(
//validate username with limited characters
}else if (! preg_match('#[A-Z]{1}[A-Z,0-9]+#i', $_POST["username"] ) ){
echo "<p> </p><p> </p><p> </p><br />Username must only contain numbers and letters. No spaces.<p> </p><p> </p><a href='javascript:javascript:history.go(-1)'>Click here to go back to previous page</a>";
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ASKER
You hit it on the money!
NOTE: On my regex, if the word must contain MORE than ONE character, change the * to +:
}else if (!(preg_match('/^[a-z][a-z
}else if (!(preg_match('/^[a-z][a-z
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Moving onward and looking at your code, you had no quantifiers in the expression. try the following UNTESTED code
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Notice the {1} and + I have added. I have also removed a spurious comma