PHP imagejpeg Function: Output JPEG Image to Browser or File
The article explains PHP's imagejpeg() function, detailing its parameters, return values, and usage example for creating and outputting a JPEG image directly to the browser or saving it to a file, including optional quality settings.
imagejpeg() outputs an image resource as a JPEG file, either sending it directly to the browser or saving it to a specified filename.
Parameters
image – The image resource returned by functions such as imagecreatetruecolor().
filename – Path to save the file; if omitted or NULL, the JPEG data is sent to the output buffer.
quality – Optional integer from 0 (worst) to 100 (best); default is the IJG library default (~75).
Return value
Returns TRUE on success, FALSE on failure.
Example
<?php
// Create a blank image and add some text
$im = imagecreatetruecolor(120, 20);
$text_color = imagecolorallocate($im, 233, 14, 91);
imagestring($im, 1, 5, 5, 'A Simple Text String', $text_color);
// Set the content type header to image/jpeg
header('Content-Type: image/jpeg');
// Output the image
imagejpeg($im);
// Free memory
imagedestroy($im);
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