<?php
namespace ImageOptimizer\TypeGuesser;
class ExtensionTypeGuesser implements TypeGuesser
public function guess($filepath)
{
$ext = strtolower(pathinfo($filepath, PATHINFO_EXTENSION));
switch($ext) {
case 'png':
return self::TYPE_PNG;
case 'gif':
return self::TYPE_GIF;
case 'jpg':
case 'jpeg':
return self::TYPE_JPEG;
default:
return self::TYPE_UNKNOWN;
}
}
}Manipulate images: remove unnecessary colors, pixels, etc., for example, change the image from large to small. The requirement for web images is to publish images of the highest possible quality in the shortest possible transmission time. Therefore, when designing and processing web page images, it is required that the images have the highest possible resolution and the smallest possible size, so that the download speed of the images can be the fastest. To do this, the image must be optimized.
All resources on this site are contributed by netizens or reprinted by major download sites. Please check the integrity of the software yourself! All resources on this site are for learning reference only. Please do not use them for commercial purposes. Otherwise, you will be responsible for all consequences! If there is any infringement, please contact us to delete it. Contact information: admin@php.cn
Tutorial on inserting pictures into specific cells in Excel using openpyxl
27 Nov 2025
This article details how to insert a picture into a specific cell of an Excel worksheet using Python's openpyxl library. The tutorial covers the key steps of loading an image, anchoring it to a specific cell, and automatically adjusting the row height and column width of the cell based on the image size. Through these methods, you can achieve the effect of the picture being perfectly visually adapted and "embedded" into the specified cell, instead of just being a floating object.
How to use Picture-in-Picture mode in Firefox? (Video Multitasking)
25 Dec 2025
TousePicture-in-PictureinFirefoxonmacOS:1)Right-clickaplayingvideoandselect“Picture-in-Picture”;2)PressCmd Shift ]whilefocusedonthevideo;3)UseDeveloperTools’InspectortotogglePiPontheelement;or4)Dragadraggablevideothumbnailoutsidethebrowserwindow.
Fancybox 5: Correctly listen to navigation events and execute custom functions
15 Dec 2025
This tutorial explains in detail how to correctly listen to the navigation events of the image library (such as "next picture") in Fancybox 5 and execute custom JavaScript functions. This article will distinguish between the configuration options of Fancybox.bind and the event listening mechanism of Fancybox.on, and demonstrate how to avoid common syntax errors and logic misunderstandings through sample code to ensure that your custom logic is accurately triggered when Fancybox navigates.
How to use Picture-in-Picture mode in Chrome? (Simple guide)
08 Jan 2026
TousePicture-in-PictureinChromeonmacOS:enablechrome://flags/#enable-picture-in-picture,relaunchChrome,thenclickthePiPbutton,right-click→“PictureinPicture”,oruseCommand Shift I.Forblockedsites,editthetaginDevToolsorinstallthe“PiPToggle”extension.
PHP implements adding watermark effect to an image, _PHP tutorial
12 Jul 2016
PHP implements adding watermark effect to an image. PHP implements adding watermark effect to a picture, PHP implements adding watermark effect to an image php/** * Function: Add watermark effect to a picture * $i The picture to be watermarked * $t water
Image display problem between React components: precise data transfer and dynamic update through Props
28 Nov 2025
This article aims to solve the problem in React applications that after clicking a picture in the picture list, the corresponding picture cannot be displayed correctly in the new page or modal box, and the picture at the end of the list is always displayed. The core solution is to use React's props mechanism to pass the clicked image data to the target component as an attribute, and combine useState and useEffect to implement dynamic updates to ensure that the user interface always displays the correct content.
Popular tool
PHP multifunctional image processing class
PHP multifunctional image processing class
PHP library for creating animated GIFs
PHP library for creating animated GIFs