PHP Manual»GD and Image Funzioni»imageflip

imageflip

(PHP 5 >= 5.5.0, PHP 7, PHP 8)

imageflip — Flips an image using a given mode

Descrizione

function imageflip(GdImage $image, int $mode): true

Flips the image image using the given mode.

Elenco dei parametri

image

Una risorsa immagine, restituita da una delle funzioni di creazione immagine, come imagecreatetruecolor().

mode

Flip mode, this can be one of the IMG_FLIP_* constants:

Constant	Meaning
`IMG_FLIP_HORIZONTAL`	Flips the image horizontally.
`IMG_FLIP_VERTICAL`	Flips the image vertically.
`IMG_FLIP_BOTH`	Flips the image both horizontally and vertically.

Valori restituiti

Always returns true.

Log delle modifiche

Versione	Descrizione
8.0.0	`image` expects a GdImage instance now; previously, a valid `gd` resource was expected.

Esempi

Example #1 Flips an image vertically

This example uses the IMG_FLIP_VERTICAL constant.

<?php
// File
$filename = 'phplogo.png';

// Content type
header('Content-type: image/png');

// Load
$im = imagecreatefrompng($filename);

// Flip it vertically
imageflip($im, IMG_FLIP_VERTICAL);

// Output
imagejpeg($im);
?>

Il precedente esempio visualizzerà qualcosa simile a:

Output of example: Vertically flipped image

Example #2 Flips the image horizontally

This example uses the IMG_FLIP_HORIZONTAL constant.

<?php
// File
$filename = 'phplogo.png';

// Content type
header('Content-type: image/png');

// Load
$im = imagecreatefrompng($filename);

// Flip it horizontally
imageflip($im, IMG_FLIP_HORIZONTAL);

// Output
imagejpeg($im);
?>

Il precedente esempio visualizzerà qualcosa simile a:

Output of example: Horizontally flipped image