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PHP - Manual: Imagick::setFirstIterator - 互联网笔记

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PHP官方手册 - 互联网笔记

PHP - Manual: Imagick::setFirstIterator

2025-04-26

Imagick::setFirstIterator

(PECL imagick 2, PECL imagick 3)

Imagick::setFirstIteratorSets the Imagick iterator to the first image

说明

public Imagick::setFirstIterator(): bool

Sets the Imagick iterator to the first image.

参数

此函数没有参数。

返回值

成功时返回 true

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simonjjarrett at gmail dot com
4 years ago
The following function applies a callback to each image in an Imagick object.

<?php
function imagickMap($callback, $im)
{
$im->setFirstIterator();

do
{
$callback($im);
}
while (
$im->nextImage() );
}
?>

E.g. to convert a series of images to grayscale:

<?php
imagickMap
(
function(
$im)
{
$im->setImageType(Imagick::IMGTYPE_GRAYSCALEMATTE);
},
$im
);
?>

官方地址:https://www.php.net/manual/en/imagick.setfirstiterator.php

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