PHP
COMMON ERRORS IN PHP
Login .php
1 <html>
2 <body>
3 <form
action="login.php" method="POST">
4 Username<input
type="text" name="myname"><br>
5 Passsword<input
type="password" name="password"><br>
6 <input
type="submit" name="submit" value="click
here"><br>
7 </form>
8 </body>
9 </html>
10 <?php
11 $name=$_POST['myname'];
12 $pass=$_POST['password'];
13 if($name&&$pass)
14 echo
"username:=".$name."Password:=".$pass;
15 ?>
Parse error
It is because of the semicolon missing or bracket missing or
not ending single
or double quotes correctly missing or extra brackets
I f we remove semicolon of the first php code it shows below
error
$name=$_POST['myname']
$pass=$_POST['password'];
Solution :Put a
semicolon at the end of 11 th line
GET POST
Undefined variable and undefined index errors
In the above login page ‘myname’ and ‘password’ is
unidentified before post .So while page
loading time
Below shown error comes.
Solution:We need to put an @ symbol at the begging or middle
of that line
Or you can put ‘error_reporting(0);’
on top of the php code.
<?php
@$name=$_POST['myname'];
@$pass=$_POST['password'];
if($name&&$pass)
echo
"username:=".$name."Password:=".$pass;
?>
Or
<?php
error_reporting(0);
$name=$_POST['myname'];
?>
what does the @ operator do? It temporarily sets the error
reporting level to 0 for that line. If that line triggers an error, the error
handler will still be called, but it will be called with an error level of 0
error_reporting()
refer:
Image and video uploading code (tested with PHP Version 5.4.17)
Before uploading video we need to change PHP the maximum upload file size
For doing that
You need to set the value of
upload_max_filesize and post_max_size in your php.ini :; Maximum allowed size for uploaded files.
upload_max_filesize = 40M
; Must be greater than or equal to upload_max_filesize
post_max_size = 40MPHP the maximum upload file size
HTML form
<!DOCTYPE html>
<head>
<title></title>
</head>
<body>
<form action="upload_file.php" method="post" enctype="multipart/form-data">
<label for="file"><span>Filename:</span></label>
<input type="file" name="file" id="file" />
<br />
<input type="submit" name="submit" value="Submit" />
</form>
</body>
</html>PHP handler (upload_file.php)
Change upload folder to preferred name. Presently saves to
upload/<?php
$allowedExts = array("jpg", "jpeg", "gif", "png", "mp3", "mp4", "wma");
$extension = pathinfo($_FILES['file']['name'], PATHINFO_EXTENSION);
if ((($_FILES["file"]["type"] == "video/mp4")
|| ($_FILES["file"]["type"] == "audio/mp3")
|| ($_FILES["file"]["type"] == "audio/wma")
|| ($_FILES["file"]["type"] == "image/pjpeg")
|| ($_FILES["file"]["type"] == "image/gif")
|| ($_FILES["file"]["type"] == "image/jpeg"))
&& ($_FILES["file"]["size"] < 20000)
&& in_array($extension, $allowedExts))
{
if ($_FILES["file"]["error"] > 0)
{
echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
}
else
{
echo "Upload: " . $_FILES["file"]["name"] . "<br />";
echo "Type: " . $_FILES["file"]["type"] . "<br />";
echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";
echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br />";
if (file_exists("upload/" . $_FILES["file"]["name"]))
{
echo $_FILES["file"]["name"] . " already exists. ";
}
else
{
move_uploaded_file($_FILES["file"]["tmp_name"],
"upload/" . $_FILES["file"]["name"]);
echo "Stored in: " . "upload/" . $_FILES["file"]["name"];
}
}
}
else
{
echo "Invalid file";
}
?>
courtesy:
http://stackoverflow.com/questions/2184513/php-change-the-maximum-upload-file-size
http://stackoverflow.com/questions/18217964/upload-video-files-via-php-and-save-them-in-appropriate-folder-and-have-a-databa
http://stackoverflow.com/questions/2184513/php-change-the-maximum-upload-file-size
http://stackoverflow.com/questions/18217964/upload-video-files-via-php-and-save-them-in-appropriate-folder-and-have-a-databa
rename uploaded file before saving it into a directory
Instead of
move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $_FILES["file"]["name"]);
Use
$temp = explode(".",$_FILES["file"]["name"]);
$newfilename = rand(1,99999) . '.' .end($temp);
move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $newfilename;
Changed to reflect your question, will product a random number between 1-99999 and append the extension from the originally uploaded file.
rand(1,9999) cand be replaced with your id or name while using in registration page.
courtesy:
http://stackoverflow.com/questions/18705639/how-to-rename-uploaded-file-before-saving-it-into-a-directory
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