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PHP | Gmagick labelimage() Function

  • Last Updated : 23 Jan, 2020

The Gmagick::labelimage() function is an inbuilt function in PHP which is used to label to the image. A label is just a string attached to an image which can be extracted back later from the image. This label is not visible on the image itself but you can do so using annotate function.

Syntax:

mixed Gmagick::labelimage( string $label )

Parameters: This function accepts a single parameter $label which holds the label of an image.

Return Value: This function returns the Gmagick object with the label.

Exceptions: This function throws GmagickException on error.



Below given programs illustrate the Gmagick::labelimage() function in PHP:

Used Image:

Program 1:




<?php
  
// Create a new Gmagick object
$gmagick = new Gmagick('geeksforgeeks.png');
  
$label = "Hello World";
  
// Label the image
$gmagick->labelimage($label);
  
// Get the label from image
$label = substr($gmagick, -28, strlen($label) + 1);
echo $label;
?>

Output:

Hello World

Program 2:




<?php
  
// Create a new Gmagick object
$gmagick = new Gmagick('geeksforgeeks.png');
  
$label = "This is my label";
  
// Label the image
$gmagick->labelimage($label);
  
// Get the label from image
$getlabel = substr($gmagick, -32, strlen($label));
   
// Create a GmagickDraw object
$draw = new GmagickDraw();
   
// Set the color
$draw->setFillColor('white');
   
// Function to draw rectangle
$draw->rectangle(0, 0, 800, 400);
   
// Set the fill color
$draw->setFillColor('orange');
   
// Set the font size
$draw->setfontsize(50);
   
// Annotate a text
$draw->annotate(30, 100, $getlabel);
   
// Use of drawimage function
$gmagick->drawImage($draw);
   
// Display the output image
header("Content-Type: image/png");
echo $gmagick->getImageBlob();
?>

Output:

Reference: https://www.php.net/manual/en/gmagick.labelimage.php




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