php - error for displayed even it has not been submitted yet -
i load page yet error has been displayed
<?php $nameerr = $emailerr = $iderr = $passworderr = ""; $name = $email = $id = $password = ""; if ($_server["request_method"] == "post") { if (empty($_post["name"])) { $nameerr = "name required"; } else { $name = test_input($_post["name"]); // check if name contains letters , whitespace if (!preg_match("/^[a-za-z ]*$/",$name)) { $nameerr = "only letters , white space allowed"; } } if (empty($_post["email"])) { $emailerr = "email required"; } else { $email = test_input($_post["email"]); // check if e-mail address well-formed if (!filter_var($email, filter_validate_email)) { $emailerr = "invalid email format"; } } if (empty($_post["id"])) { $gendererr = "matric number required"; } else { $website = test_input($_post["id"]); if (!preg_match("/^[0-9].*$/",$id)){ $iderr = "only numbers allowed"; } } } if (empty($_post["password"])) { $passworderr = "password required"; } else { $password = test_input($_post["password"]); // check if name contains letters , whitespace if (!preg_match("/^[a-za-z0-9]+$/",$password)) { $nameerr = "special characters not allowed"; } } function test_input($data) { $data = trim($data); $data = stripslashes($data); $data = htmlspecialchars($data); return $data; } ?> <!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" /> <title>pendaftaran kali pertama</title> <style type="text/css"> <!-- .style1 { color: #ffcc00; font-weight: bold; } .error{ color:#ffcc00} --> </style> </head> <body> <div align="center"> <form method="post" action="<?php echo htmlspecialchars($_server["php_self"]);?>"> <table width="62%" border="0" cellpadding="2" cellspacing="2"> <tr> <td height="35" colspan="4" bgcolor="#660066"><div align="center" class="style1">pendaftaran kali pertama </div></td> </tr> <tr> <td width="33%"><div align="right"><strong>nama </strong></div></td> <td width="5%"><div align="center"><strong>:</strong></div></td> <td width="62%"><input name="name" type="text" size="50" /><span class="error">* <?php echo $nameerr;?></span></td> </tr> <tr> <td><div align="right"><strong>no. pelajar </strong></div></td> <td><div align="center"><strong>:</strong></div></td> <td><input name="id" type="text" size="50" maxlength="10" /><span class="error">* <?php echo $iderr;?></span></td> </tr> <tr> <td><div align="right"><strong>kata laluan(8 aksara sahaja)</strong></div></td> <td><div align="center"><strong>:</strong></div></td> <td><input name="password" type="text" size="50" maxlength="8" /><span class="error">* <?php echo $passworderr;?></span></td> </tr> <tr> <td><div align="right"><strong>emel</strong></div></td> <td><div align="center"><strong>:</strong></div></td> <td><input name="email" type="text" size="50" /><span class="error">* <?php echo $emailerr;?></span></td> </tr> <tr> <td> </td> <td> </td> <td><input type="submit" value="submit"/></td> </tr> </table> </form> </div> </body> </html>it no error, when load page(the submit button not click) password error has been displayed. other field error work fine.
your password block outside of post block , why $passworderr set before form submitted.
if (empty($_post["password"])) { $passworderr = "password required"; } else { $password = test_input($_post["password"]); // check if name contains letters , whitespace if (!preg_match("/^[a-za-z0-9]+$/",$password)) { $passworderr = "special characters not allowed"; } } put inside block if ($_server["request_method"] == "post") {
also in code $nameerr = "special characters not allowed"; wrong. must assign error $passworderr have done in code above.
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