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Resize Image Without Stretching in Codeigniter

Snippets

By this article “resize an image without stretching in CodeIgniter” I’m going to show you the mathematics and logic of resizing an image to a different width and height without squeezing or stretching the original image.

If the destination image contains a different aspect ratio than the source image, then the source image will

Snippets

if ($this->db->affected_rows() > 0)
{
  return TRUE;
}
else
{
  return FALSE;
}

if ($this->db->affected_rows() > 0)

{

return TRUE;

}

else

{

return FALSE;

}

if ($this->db->affected_rows() > 0)
  return TRUE;
else
  return FALSE;

if ($this->db->affected_rows() > 0)

return TRUE;

else

return FALSE;

return ($this->db->affected_rows() > 0) ? TRUE : FALSE;

1	return ($this->db->affected_rows() > 0) ? TRUE : FALSE;

also(much better)

return ($this->db->affected_rows() > 0);

1	return ($this->db->affected_rows() > 0);

A better solution I’ve found is to manage the difference between an ERROR and 0 affected rows. 0 affected rows is not necessarily a bad thing, but an error is something you do want to know about:

if ($this->db->_error_message()) {
    return FALSE; // Or do whatever you gotta do here to raise an error
} else {
    return $this->db->affected_rows();
}

if ($this->db->_error_message()) {

return FALSE; // Or do whatever you gotta do here to raise an error

} else {

return $this->db->affected_rows();

}

Now your function can

Snippets

SOLUTION ONE

$this->db->where('id', '3');
// here we select every column of the table
$q = $this->db->get('my_users_table');
$data = $q->result_array();

echo($data[0]['age']);

$this->db->where('id', '3');

// here we select every column of the table

$q = $this->db->get('my_users_table');

$data = $q->result_array();

echo($data[0]['age']);

SOLUTION TWO

// here we select just the age column
$this->db->select('age');
$this->db->where('id', '3');
$q = $this->db->get('my_users_table');
$data = $q->result_array();

echo($data[0]['age']);

// here we select just the age column

$this->db->select('age');

$this->db->where('id', '3');

$q = $this->db->get('my_users_table');

$data = $q->result_array();

echo($data[0]['age']);

SOLUTION THREE

$this->db->select('age');
$this->db->where('id', '3');
$q = $this->db->get('my_users_table');
// if id is unique, we want to return just one row
$data = array_shift($q->result_array());

echo($data['age']);

$this->db->select('age');

$this->db->where('id', '3');

$q = $this->db->get('my_users_table');

// if id is unique, we want to return just one row

$data = array_shift($q->result_array());

echo($data['age']);

SOLUTION FOUR (NO ACTIVE RECORD)

$q = $this->db->query('SELECT age FROM my_users_table WHERE id = ?',array(3));
$data = array_shift($q->result_array());
echo($data['age']);

$q = $this->db->query('SELECT age FROM my_users_table WHERE id = ?',array(3));

$data = array_shift($q->result_array());

echo($data['age']);

you can use row() instead of result()

$this->db->where('id', '3');
$q = $this->db->get('my_users_table')->row();

1 2	$this->db->where('id', '3'); $q = $this->db->get('my_users_table')->row();

Accessing a single row

//Result as an Object
$result = $this->db->select('age')->from('my_users_table')->where('id', '3')->limit(1)->get()->row();
echo $result->age;

//Result as an Array
$result = $this->db->select('age')->from('my_users_table')->where('id', '3')->limit(1)->get()->row_array();
echo $result['age'];

//Result as an Object

$result = $this->db->select('age')->from('my_users_table')->where('id', '3')->limit(1)->get()->row();

echo $result->age;

//Result as an Array

$result = $this->db->select('age')->from('my_users_table')->where('id', '3')->limit(1)->get()->row_array();

echo $result['age'];

Snippets

if ( ! function_exists('create_square_thumb'))
{
	function create_square_thumb($img,$dest)
	{
		$seg = explode('.',$img);
		$thumbType    = 'jpg';
		$thumbSize    = 300;
		$thumbPath    = $dest;
		$thumbQuality = 100;

		$last_index = count($seg);
		$last_index--;

		if($seg[$last_index]=='jpg' || $seg[$last_index]=='JPG' || $seg[$last_index]=='jpeg')
		{
			if (!$full = imagecreatefromjpeg($img)) {
			    return 'error';
			}			
		}
		else if($seg[$last_index]=='png')
		{
			if (!$full = imagecreatefrompng($img)) {
			    return 'error';
			}			
		}
		else if($seg[$last_index]=='gif')
		{
			if (!$full = imagecreatefromgif($img)) {
			    return 'error';
			}			
		}
		 
	    $width  = imagesx($full);
	    $height = imagesy($full);
		 
	    /* work out the smaller version, setting the shortest side to the size of the thumb, constraining height/wight */
	    if ($height > $width) {
	      $divisor = $width / $thumbSize;
	    } else {
	      $divisor = $height / $thumbSize;
	    }
		 
	    $resizedWidth   = ceil($width / $divisor);
	    $resizedHeight  = ceil($height / $divisor);
		 
	    /* work out center point */
	    $thumbx = floor(($resizedWidth  - $thumbSize) / 2);
	    $thumby = floor(($resizedHeight - $thumbSize) / 2);
		 
	    /* create the small smaller version, then crop it centrally to create the thumbnail */
	    $resized  = imagecreatetruecolor($resizedWidth, $resizedHeight);
	    $thumb    = imagecreatetruecolor($thumbSize, $thumbSize);

	    imagealphablending( $resized, false );
		imagesavealpha( $resized, true );

		imagealphablending( $thumb, false );
		imagesavealpha( $thumb, true );

	    imagecopyresized($resized, $full, 0, 0, 0, 0, $resizedWidth, $resizedHeight, $width, $height);
	    imagecopyresized($thumb, $resized, 0, 0, $thumbx, $thumby, $thumbSize, $thumbSize, $thumbSize, $thumbSize);
		 
		 $name = name_from_url($img);

	    imagejpeg($thumb, $thumbPath.str_replace('_large.jpg', '_thumb.jpg', $name), $thumbQuality);
	}
	
}

if ( ! function_exists('create_square_thumb'))

{

function create_square_thumb($img,$dest)

{

$seg = explode('.',$img);

$thumbType = 'jpg';

$thumbSize = 300;

$thumbPath = $dest;

$thumbQuality = 100;

$last_index = count($seg);

$last_index--;

if($seg[$last_index]=='jpg' || $seg[$last_index]=='JPG' || $seg[$last_index]=='jpeg')

{

if (!$full = imagecreatefromjpeg($img)) {

return 'error';

}

else if($seg[$last_index]=='png')

{

if (!$full = imagecreatefrompng($img)) {

return 'error';

}

else if($seg[$last_index]=='gif')

{

if (!$full = imagecreatefromgif($img)) {

return 'error';

}

$width = imagesx($full);

$height = imagesy($full);

/* work out the smaller version, setting the shortest side to the size of the thumb, constraining height/wight */

if ($height > $width) {

$divisor = $width / $thumbSize;

} else {

$divisor = $height / $thumbSize;

}

$resizedWidth = ceil($width / $divisor);

$resizedHeight = ceil($height / $divisor);

/* work out center point */

$thumbx = floor(($resizedWidth - $thumbSize) / 2);

$thumby = floor(($resizedHeight - $thumbSize) / 2);

/* create the small smaller version, then crop it centrally to create the thumbnail */

$resized = imagecreatetruecolor($resizedWidth, $resizedHeight);

$thumb = imagecreatetruecolor($thumbSize, $thumbSize);

imagealphablending( $resized, false );

imagesavealpha( $resized, true );

imagealphablending( $thumb, false );

imagesavealpha( $thumb, true );

imagecopyresized($resized, $full, 0, 0, 0, 0, $resizedWidth, $resizedHeight, $width, $height);

imagecopyresized($thumb, $resized, 0, 0, $thumbx, $thumby, $thumbSize, $thumbSize, $thumbSize, $thumbSize);

$name = name_from_url($img);

imagejpeg($thumb, $thumbPath.str_replace('_large.jpg', '_thumb.jpg', $name), $thumbQuality);

}

if ( ! function_exists('create_rectangle_thumb'))
{
	function create_rectangle_thumb($img,$dest)
	{
		$seg = explode('.',$img);
		$thumbType    	= 'jpg';
        $thumbSize    	= 300;
        $thumbWidth 	= 300;
        $thumbHeight 	= 226;
        $thumbPath    	= $dest;
        $thumbQuality 	= 100;

		$last_index = count($seg);
		$last_index--;

		if($seg[$last_index]=='jpg' || $seg[$last_index]=='JPG' || $seg[$last_index]=='jpeg')
		{
			if (!$full = imagecreatefromjpeg($img)) {
			    return 'error';
			}			
		}
		else if($seg[$last_index]=='png')
		{
			if (!$full = imagecreatefrompng($img)) {
			    return 'error';
			}			
		}
		else if($seg[$last_index]=='gif')
		{
			if (!$full = imagecreatefromgif($img)) {
			    return 'error';
			}			
		}
		 
	    $width  = imagesx($full);
	    $height = imagesy($full);
		 

	    # work out the smaller version, setting the shortest side to the size of the thumb, constraining height/wight 
        if ($height > $width) {
            $divisor = $width / $thumbHeight;
        } else {
            $divisor = $height / $thumbWidth;
        }

		 
        $resizedWidth   = ceil($width / $divisor);
        $resizedHeight  = ceil($height / $divisor);
		 
        # work out center point 
        $thumbx = floor(($resizedWidth  - $thumbWidth) / 2);
        $thumby = floor(($resizedHeight - $thumbHeight) / 2);
		 
	    /* create the small smaller version, then crop it centrally to create the thumbnail */
        $resized  = imagecreatetruecolor($resizedWidth, $resizedHeight);
        $thumb    = imagecreatetruecolor($thumbWidth, $thumbHeight);

	    imagealphablending( $resized, false );
		imagesavealpha( $resized, true );

		imagealphablending( $thumb, false );
		imagesavealpha( $thumb, true );

	    imagecopyresized($resized, $full, 0, 0, 0, 0, $resizedWidth, $resizedHeight, $width, $height);
	    imagecopyresized($thumb, $resized, 0, 0, $thumbx, $thumby, $thumbSize, $thumbSize, $thumbSize, $thumbSize);
		 
		 $name = name_from_url($img);

	    imagejpeg($thumb, $thumbPath.str_replace('_large.jpg', '_thumb.jpg', $name), $thumbQuality);
	}
	
}

if ( ! function_exists('create_rectangle_thumb'))

{

function create_rectangle_thumb($img,$dest)

{

$seg = explode('.',$img);

$thumbType = 'jpg';

$thumbSize = 300;

$thumbWidth = 300;

$thumbHeight = 226;

$thumbPath = $dest;

$thumbQuality = 100;

$last_index = count($seg);

$last_index--;

if($seg[$last_index]=='jpg' || $seg[$last_index]=='JPG' || $seg[$last_index]=='jpeg')

{

if (!$full = imagecreatefromjpeg($img)) {

return 'error';

}

else if($seg[$last_index]=='png')

{

if (!$full = imagecreatefrompng($img)) {

return 'error';

}

else if($seg[$last_index]=='gif')

{

if (!$full = imagecreatefromgif($img)) {

return 'error';

}

$width = imagesx($full);

$height = imagesy($full);

# work out the smaller version, setting the shortest side to the size of the thumb, constraining height/wight

if ($height > $width) {

$divisor = $width / $thumbHeight;

} else {

$divisor = $height / $thumbWidth;

}

$resizedWidth = ceil($width / $divisor);

$resizedHeight = ceil($height / $divisor);

# work out center point

$thumbx = floor(($resizedWidth - $thumbWidth) / 2);

$thumby = floor(($resizedHeight - $thumbHeight) / 2);

/* create the small smaller version, then crop it centrally to create the thumbnail */

$resized = imagecreatetruecolor($resizedWidth, $resizedHeight);

$thumb = imagecreatetruecolor($thumbWidth, $thumbHeight);

imagealphablending( $resized, false );

imagesavealpha( $resized, true );

imagealphablending( $thumb, false );

imagesavealpha( $thumb, true );

imagecopyresized($resized, $full, 0, 0, 0, 0, $resizedWidth, $resizedHeight, $width, $height);

imagecopyresized($thumb, $resized, 0, 0, $thumbx, $thumby, $thumbSize, $thumbSize, $thumbSize, $thumbSize);

$name = name_from_url($img);

imagejpeg($thumb, $thumbPath.str_replace('_large.jpg', '_thumb.jpg', $name), $thumbQuality);

}

Snippets

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