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Rechercher une fonction PHP

imagejpeg

Contents

(PHP 4, PHP 5, PHP 7)

imagejpeg — Output image to browser or file

Description

imagejpeg ( resource $image [, mixed $to = NULL [, int $quality = -1 ]] ) : bool

imagejpeg() creates a JPEG file from the given image.

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Parameters

image

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

to

The path or an open stream resource (which is automatically being closed after this function returns) to save the file to. If not set or NULL, the raw image stream will be outputted directly.

quality

quality is optional, and ranges from 0 (worst quality, smaller file) to 100 (best quality, biggest file). The default (-1) uses the default IJG quality value (about 75).

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Return Values

Returns TRUE on success or FALSE on failure.

Caution

However, if libgd fails to output the image, this function returns TRUE.

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Changelog

Version Description
5.4.0 Added support for passing a stream resource to to.
5.4.0 Disallowed passing an empty string to to to skip this argument.

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Examples

Example #1 Outputting a JPEG image to the browser

<?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 - in this case image/jpeg
header('Content-Type: image/jpeg');

// Output the image
imagejpeg($im);

// Free up memory
imagedestroy($im);
?>

The above example will output something similar to:

Output of example : Outputting a JPEG image

Example #2 Saving a JPEG image to a file

<?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);

// Save the image as 'simpletext.jpg'
imagejpeg($im, 'simpletext.jpg');

// Free up memory
imagedestroy($im);
?>

Example #3 Outputting the image at 75% quality to the browser

<?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 - in this case image/jpeg
header('Content-Type: image/jpeg');

// Skip the to parameter using NULL, then set the quality to 75%
imagejpeg($im, NULL, 75);

// Free up memory
imagedestroy($im);
?>

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Notes

Note:

If you want to output Progressive JPEGs, you need to set interlacing on with imageinterlace().

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See Also

Find a PHP function

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Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-imagejpeg.html

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References

  1. View the html document Language of the document:fr Manuel PHP : http://php.net

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