How to resize image in php codeigniter

Set the config details in array , like we set height and width to 50 * 50 , We are using inbuilt image library gd2.

	// Configuration
	$config['image_library'] = 'gd2';
	$config['source_image'] = './img/images/uploaded/'.$imgName.".jpeg";
	$config['new_image'] = './img/images/uploaded/'.$imgName."_new.jpeg";
	$config['create_thumb'] = TRUE;
	$config['maintain_ratio'] = TRUE;
	$config['width'] = 50;
	$config['height'] = 50;

// Load the Library
$this->load->library('image_lib', $config);

	// resize image
	$this->image_lib->resize();
	// handle if there is any problem
	if ( ! $this->image_lib->resize()){
		echo $this->image_lib->display_errors();
	}

resize() function resize the image file and create new image file in specified folder. You will get errors "$this->image_lib->display_errors()", if there is any problem while image manipulation.

function imageResize50X50($imgName){
	$img_path =  realpath("img")."\\images\\uploaded\\".$imgName.".jpeg";
	
	// Configuration
	$config['image_library'] = 'gd2';
	$config['source_image'] = './img/images/uploaded/'.$imgName.".jpeg";
	$config['new_image'] = './img/images/uploaded/'.$imgName."_new.jpeg";
	$config['create_thumb'] = TRUE;
	$config['maintain_ratio'] = TRUE;
	$config['width'] = 50;
	$config['height'] = 50;

	// Load the Library
	$this->load->library('image_lib', $config);
	
	// resize image
	$this->image_lib->resize();
	// handle if there is any problem
	if ( ! $this->image_lib->resize()){
		echo $this->image_lib->display_errors();
	}
}