PHP Code

Robin · Post time: 2012-12-27 16:25

Edited by Robin at 2012-12-29 09:54

Here Iam Again With A New doubt!
I Have Got This php code from my friend! And he says he got this from php.net
i dont know how to add it, or how this works! Please help me!
Php code for mobile avatar uploading option

<?php
/***
this is a simple and complete function and
the easyest way i have found toallow you
to add an image to a form that the user can
verify before submiting
if the user do not want this image and change
his mind he can reupload a new image and we
will delete the last
i have added the debug if!move_uploaded_file
so you can verify the result withyour
directory and you can use this function to
destroy the last upload without uploading
again if you want too, just add a value...
***/
function upload_back () { global $globals ;
/***
1rst set the images dir and declare a files
array we will have to loop the images
directory to write a new name for our picture
***/
$uploaddir = 'images_dir/' ; $dir = opendir ( $uploaddir );
$files = array();
/***
if we are on a form who allow to reedit the
posted vars we can save the image previously
uploaded if the previous uploadwas successfull.
so declare that value into a global var, we
will rewrite that value in a hidden input later
to post it again if we do not need to rewrite
the image after the new uploadand just... save
the value...
***/
if(!empty( $_POST [ 'attachement_loos' ])) { $globals [ 'attachement' ] = $_POST [ 'attachement_loos' ]; }
/***
now verify if the file exists, just verify
if the 1rst array is not empty. else you
can do what you want, that form allows to
use a multipart form, for exemple for a
topic on a forum, and then to post an
attachement with all our other values
***/
if(isset( $_FILES [ 'attachement' ])&& !empty( $_FILES [ 'attachement' ][ 'name' ])) {
/***
now verify the mime, i did not find
something more easy than verify the
'image/' ty^pe. if wrong tell it!
***/
if(! eregi ( 'image/' , $_FILES [ 'attachement' ][ 'type' ])) {
echo 'The uploaded file is not an image please upload a valide file!' ;
} else {
/***
else we must loop our upload folder to find
the last entry the count will tell us and will
be used to declare the new name of the new
image. we do not want to rewrite a previously
uploaded image
***/
while( $file = readdir ( $dir )) { array_push ( $files , " $file " ); echo $file ; } closedir ( $dir );
/***
now just rewrite the name of our uploaded file
with the count and the extension, strrchr will
return us the needle for the extension
***/
$_FILES [ 'attachement' ][ 'name' ] = ceil ( count ( $files ) '1' ). '' . strrchr ( $_FILES [ 'attachement' ][ 'name' ], '.' );
$uploadfile = $uploaddir . basename ( $_FILES [ 'attachement' ][ 'name' ]);
/***
do same for the last uploaded file, just build
it if we have a previously uploaded file
***/
$previousToDestroy = empty( $globals [ 'attachement' ]) &&!empty( $_FILES [ 'attachement' ][ 'name' ]) ? '' : $uploaddir . $files [ ceil ( count ( $files )- '1' )];
// now verify if file was successfully uploaded
if(! move_uploaded_file ( $_FILES [ 'attachement' ][ 'tmp_name' ], $uploadfile )) {
echo '<pre>
Your file was not uploaded pleasetry again
here are your debug informations:
' . print_r ( $_FILES ) . '
</pre>' ;
} else {
echo 'image succesfully uploaded!' ;
}
/***
and reset the globals vars if we maybe want to
reedit the form: first the new image, second
delete the previous....
***/
$globals [ 'attachement' ] = $_FILES [ 'attachement' ][ 'name' ];
if(!empty( $previousToDestroy )) { unlink ( $previousToDestroy ); }
}
}
}
upload_back ();
/***
now the form if you need it (with the global...):
just add the hidden input whenyou write your
preview script and... in the original form but!
if you have send a value to advert your script
than we are remaking the form.for exemple with a
hidden input with "reedit" as value or with a
$_GET method who can verify that condition
***/
echo '<form action="" method="post" enctype="multipart/form-data">
<input type="file" name="attachement" name="attachement"></input>
<input type="hidden" name="attachement_loos" name="attachement_loos" value="' , $globals [ 'attachement' ], '"></input>
<input type="submit" value="submit"></input>
</form>' ;
?>

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