PHP | imagestringup() Function

Last Updated : 11 Jul, 2025
The imagestringup() function is an inbuilt function in PHP which is used to draw a string vertically. Syntax: 
bool imagestringup( $image, $font, $x, $y, $string, $color )
Parameters: This function accepts six parameters as mentioned above and described below:
  • $image: The imagecreatetruecolor() function is used to create a blank image in a given size.
  • $font: This parameter is used to set the font size. Inbuilt font in latin2 encoding can be 1, 2, 3, 4, 5 or other font identifiers registered with imageloadfont() function.
  • $x: This parameter is used to hold the x-coordinate of the upper left corner.
  • $y: This parameter is used to hold the y-coordinate of the upper left corner.
  • $string: This parameter is used to hold the string to be written.
  • $color: This parameter is used to hold the color of image.
Return Value: This function returns True on success or False on failure. Below programs illustrate the imagestringup() function in PHP: Program 1: php 
<?php

// Create a 400*300 image
$im = imagecreatetruecolor(400, 300);

// Set the background color of image 
$background_color = imagecolorallocate($im,  0, 153, 0); 
     
// Fill background with above selected color 
imagefill($im, 0, 0, $background_color); 

// Write the text
$textcolor = imagecolorallocate($im, 255, 255, 255);
imagestringup($im, 6, 195, 200, 'GeeksforGeeks', $textcolor);

// Output the picture to the browser 
header('Content-type: image/png'); 
     
imagepng($im); 
?>
Output: Program 2: php 
<?php

// Create a 400*300 image
$im = imagecreatetruecolor(400, 300);

// Set the background color of image 
$background_color = imagecolorallocate($im,  0xFF, 0xFF, 0xFF); 
     
// Fill background with above selected color 
imagefill($im, 0, 0, $background_color); 

// Write the text
$textcolor = imagecolorallocate($im, 0, 153, 0);
imagestringup($im, 6, 195, 200, 'GeeksforGeeks', $textcolor);

// Output the picture to the browser 
header('Content-type: image/png'); 
     
imagepng($im); 
?>
Output: Reference: https://www.php.net/manual/en/function.imagestringup.php
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