Resize an image using php

[deansaddigh]

The below code inserts image details to db and uploads pic to folder, can anyone show me how to resize it aswell. please

 

<?php
include("includes/connection.php");

    // Where the file is going to be placed 
    $schoolimage = "SchoolImages/";

//This path will be stored in the database as it does not contain the filename
$currentdir = getcwd();
$path = $currentdir . '/' . $schoolimage;

// Get the schoolid for the image and school linker table
$schoolid = $_POST['schoolid'];

//Get the school name
$query = "SELECT * FROM school WHERE school_id = ".$schoolid;
$result = mysql_query($query) 
	or die("Error getting school details");
$row = mysql_fetch_assoc($result);
$schoolname = $row['name']; 

//Use this path to store the path of the file in the database.
$filepath = $schoolimage . $schoolname;


//Create the folder if it does not already exist
if(!file_exists('SchoolImages'))
    {
        if(mkdir('SchoolImages'))
        {
            echo 'Folder ' . 'SchoolImages' . ' created.';
        }
        else
        {
            echo 'Error creating folder ' . 'SchoolImages';
        }
    }


//Store the folder for the course title.
    if(!file_exists( $filepath ))
    {
        if(mkdir( $filepath ))
        {
            echo 'Folder ' . $schoolname . ' created.';
        }
        else
        {
            echo 'Error creating folder ' . $schoolname;
        }
    }


// Where the file is going to be placed 
    $target_path = $filepath;

    // Add the original filename to our target path. Result is "uploads/filename.extension"
    echo $target_path = $target_path . '/' . basename( $_FILES['uploadedfile']['name']); 

if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) 
{
	echo "The file ".  basename( $_FILES['uploadedfile']['name'])." has been uploaded";
	$filename =  $_FILES['uploadedfile']['name'];

	//Store the filename, path other criteria in the database 
	echo $query = "INSERT INTO image(image_id, name, path)
	VALUES(0, '$filename', '$filepath')";

	//Perform the query
	$add = mysql_query($query, $conn)
		or die("Unable to add the image details to the database");
	$imageid = mysql_insert_id();

	//Store the filename, path other criteria in the database 
	echo $query = "INSERT INTO image_school( image_id, school_id )
	VALUES('$imageid', '$schoolid')";

	//Perform the query
	$add = mysql_query($query, $conn)
		or die("Unable to add the image details to the database");

	$message = 'Upload Successful';
} 
else
{	
	$message = 'There was an error uploading the file, please try again!';
}

//Close the connection to the database	
mysql_close($conn);
header("Location: add_school_photo_form.php? message={$message}&schoolid={$schoolid}");
//header("Location: add_school_photo_form.php? message=$message, schoolid=$schoolid");
exit();

?>

[hellrisisng]

The best way to do this would be to use somthing like PHPThumb() that uses the GD2 library available on most linux servers.

http://phpthumb.sourceforge.net/

 

or something like this:

 

*//
Note :
- GD must Enabled
- Autodetect file extension (.jpg/jpeg, .png, .gif, .wbmp)
  but some server can't generate .gif / .wbmp file types
- If your GD not support 'ImageCreateTrueColor' function,
  change one line from 'ImageCreateTrueColor' to 'ImageCreate'
  (the position in 'show' and 'save' function)
*/


class thumbnail
{
    var $img;

    function thumbnail($imgfile)
    {
        //detect image format
        $this->img["format"]=ereg_replace(".*\.(.*)$","\\1",$imgfile);
        $this->img["format"]=strtoupper($this->img["format"]);
        if ($this->img["format"]=="JPG" || $this->img["format"]=="JPEG") {
            //JPEG
            $this->img["format"]="JPEG";
            $this->img["src"] = ImageCreateFromJPEG ($imgfile);
        } elseif ($this->img["format"]=="PNG") {
            //PNG
            $this->img["format"]="PNG";
            $this->img["src"] = ImageCreateFromPNG ($imgfile);
        } elseif ($this->img["format"]=="GIF") {
            //GIF
            $this->img["format"]="GIF";
            $this->img["src"] = ImageCreateFromGIF ($imgfile);
        } elseif ($this->img["format"]=="WBMP") {
            //WBMP
            $this->img["format"]="WBMP";
            $this->img["src"] = ImageCreateFromWBMP ($imgfile);
        } else {
            //DEFAULT
            echo "Not Supported File";
            exit();
        }
        @$this->img["lebar"] = imagesx($this->img["src"]);
        @$this->img["tinggi"] = imagesy($this->img["src"]);
        //default quality jpeg
        $this->img["quality"]=75;
    }

    function size_height($size=100)
    {
        //height
        $this->img["tinggi_thumb"]=$size;
        @$this->img["lebar_thumb"] = ($this->img["tinggi_thumb"]/$this->img["tinggi"])*$this->img["lebar"];
    }

    function size_width($size=100)
    {
        //width
        $this->img["lebar_thumb"]=$size;
        @$this->img["tinggi_thumb"] = ($this->img["lebar_thumb"]/$this->img["lebar"])*$this->img["tinggi"];
    }

    function size_auto($size=100)
    {
        //size
        if ($this->img["lebar"]>=$this->img["tinggi"]) {
            $this->img["lebar_thumb"]=$size;
            @$this->img["tinggi_thumb"] = ($this->img["lebar_thumb"]/$this->img["lebar"])*$this->img["tinggi"];
        } else {
            $this->img["tinggi_thumb"]=$size;
            @$this->img["lebar_thumb"] = ($this->img["tinggi_thumb"]/$this->img["tinggi"])*$this->img["lebar"];
         }
    }

    function jpeg_quality($quality=75)
    {
        //jpeg quality
        $this->img["quality"]=$quality;
    }

    function show()
    {
        //show thumb
        @Header("Content-Type: image/".$this->img["format"]);

        /* change ImageCreateTrueColor to ImageCreate if your GD not supported ImageCreateTrueColor function*/
        $this->img["des"] = ImageCreateTrueColor($this->img["lebar_thumb"],$this->img["tinggi_thumb"]);
            @imagecopyresized ($this->img["des"], $this->img["src"], 0, 0, 0, 0, $this->img["lebar_thumb"], $this->img["tinggi_thumb"], $this->img["lebar"], $this->img["tinggi"]);

        if ($this->img["format"]=="JPG" || $this->img["format"]=="JPEG") {
            //JPEG
            imageJPEG($this->img["des"],"",$this->img["quality"]);
        } elseif ($this->img["format"]=="PNG") {
            //PNG
            imagePNG($this->img["des"]);
        } elseif ($this->img["format"]=="GIF") {
            //GIF
            imageGIF($this->img["des"]);
        } elseif ($this->img["format"]=="WBMP") {
            //WBMP
            imageWBMP($this->img["des"]);
        }
    }

    function save($save="")
    {
        //save thumb
        if (empty($save)) $save=strtolower("./thumb.".$this->img["format"]);
        /* change ImageCreateTrueColor to ImageCreate if your GD not supported ImageCreateTrueColor function*/
        $this->img["des"] = ImageCreateTrueColor($this->img["lebar_thumb"],$this->img["tinggi_thumb"]);
            @imagecopyresized ($this->img["des"], $this->img["src"], 0, 0, 0, 0, $this->img["lebar_thumb"], $this->img["tinggi_thumb"], $this->img["lebar"], $this->img["tinggi"]);

        if ($this->img["format"]=="JPG" || $this->img["format"]=="JPEG") {
            //JPEG
            imageJPEG($this->img["des"],"$save",$this->img["quality"]);
        } elseif ($this->img["format"]=="PNG") {
            //PNG
            imagePNG($this->img["des"],"$save");
        } elseif ($this->img["format"]=="GIF") {
            //GIF
            imageGIF($this->img["des"],"$save");
        } elseif ($this->img["format"]=="WBMP") {
            //WBMP
            imageWBMP($this->img["des"],"$save");
        }
    }
}

[deansaddigh]

could you possibly show me how to implement that on to the code i specified at all?

im just not sure how to do that part

 

Kind Regards

 

Dean

[hellrisisng]

Are you wanting to resize the image resolution before it is saved onto the server or just resize it when you are displaying it?

[deansaddigh]

i would like to resize it before its saved onto the server ideally

[hellrisisng]

      // This is the temporary file created by PHP

      $uploadedfile = $_FILES['uploadfile']['tmp_name'];

      // Create an Image from it so we can do the resize

      $src = imagecreatefromjpeg($uploadedfile);

      // Capture the original size of the uploaded image

      list($width,$height)=getimagesize($uploadedfile);

      // For our purposes, I have resized the image to be
      // 600 pixels wide, and maintain the original aspect
      // ratio. This prevents the image from being "stretched"
      // or "squashed". If you prefer some max width other than
      // 600, simply change the $newwidth variable

      $newwidth=600;
      $newheight=($height/$width)*600;
      $tmp=imagecreatetruecolor($newwidth,$newheight);

      // this line actually does the image resizing, copying from the original
      // image into the $tmp image

      imagecopyresampled($tmp,$src,0,0,0,0,$newwidth,$newheight,$width,$height);

      // now write the resized image to disk. I have assumed that you want the
      // resized, uploaded image file to reside in the SchoolImages directory.

      $filename = "SchoolImages/". $_FILES['uploadfile']['name'];
      imagejpeg($tmp,$filename,100);
      imagedestroy($src);
      imagedestroy($tmp); // NOTE: PHP will clean up the temp file it created when the request

      // has completed.

 

For more info on how to use the function try here: http://php.net/manual/en/function.imagecreatefromjpeg.php

you can also find out about the getimagesize() function as well, you should be able to intergrate your script into this!

[deansaddigh]

Many thanks, i have done it.

 

thanks again mate

 

kind regards

 

Dean

[hellrisisng]

Did you use the code i supplyed to solve it?

[deansaddigh]

I did indeed sir.