Summary of php GD2 function usage examples

Use GD2 function to implement chart analysis of product data (Typical application tutorial of PHP graphics and images 6) Using charts to analyze product data information is currently the most commonly used data management model for large and medium-sized enterprises. Analyzing products through charts can not only be clear at a glance, but also You can make timely decisions on the next step of product planning and quickly improve the economic benefits of the company. It can be seen that using charts to analyze product data trends is the foundation for the rapid development of companies. This article is to introduce chart analysis of product data! In the previous article "Using the GD2 function to add row and column labels to charts (Typical Application Tutorial 5 of PHP graphics images)" we introduced adding row and column labels to charts, then use the GD2 function to implement chart analysis of product data, and keep up. The content of one article is inseparable. To use the content of the previous article, let’s introduce it in detail below! The technical points are mainly applied to the array() function and imagestring() function to add various product data information to the chart. Among them, the imagestring() function has been introduced in detail in an article we have deleted, and array() is in the array topic. There is also a detailed introduction. We will not give a detailed introduction here. Friends who are unclear can

1. Use the GD2 function to implement chart analysis of product data (PHP graphics and images) Typical Application Tutorial 6)

Introduction: Using charts to analyze product data information is currently the most popular method for large and medium-sized enterprises. A commonly used data management model, using charts to analyze products can not only make it clear at a glance, but also make timely decisions on the next step of product planning, quickly improving the economic benefits of the company. It can be seen that using charts to analyze product data trends is an important factor for the rapid development of companies. Basically, this article is to introduce chart analysis of product data!

2. Use the GD2 function to add row and column labels to the chart (Typical Application Tutorial of PHP Graphics and Images 5)

Introduction: Charts are widely used in data and are also very useful. Complex data can be displayed visually through data charts, so we This article mainly explains how to add rows and columns to a chart!

3. Use the GD2 function to draw geometric figures (Typical Application Tutorial 4 of PHP graphics images)

Introduction: This article mainly explains how to use the GD2 function to draw geometric figures. First, we need to create an image. As we said in the previous article, create an image. It is the first step in all image operations, and then draws the graphic outline based on the coordinate points on the background, and finally outputs the graphic!

4. How to use the GD2 function to add text to pictures (Typical application tutorial of PHP graphics and images 2)

Introduction: The GD library in PHP supports Chinese, but it must be transmitted in UTF-8 encoding format. If you use the imagesString() function to draw Chinese characters directly, Garbled characters will appear. This is because GD2 can only accept UTF-8 encoding format for Chinese and uses English fonts by default. Therefore, to output Chinese strings, the Chinese strings must be transcoded and the fonts used for Chinese strings must be set. Otherwise, , the output can only be garbled code!

5. Understand the GD2 function library

# #Introduction:: Understand the GD2 function library: PHP has been widely used in the field of web development. PHP can not only generate HTML pages, but also create and operate data in binary form, such as images, files, etc. The use of PHP to operate graphics can be achieved through the GD2 function library. You can use the GD2 function library to draw various images and statistical charts on the page. If combined with Ajax technology, you can also create a variety of powerful dynamic charts. The GD2 library is an open, open-source function library for dynamically creating images. Currently, the GD2 library supports GIF, PNG, JPEG, W

6. Jpgraph class library introduction ntgraph graph download pyqtgrap

Introduction: graph, jpg: Jpgraph class library introduction: Jpgraph class library is a A class library for graphics and image drawing that can be applied to PHP 4.3.1 or above. This class library is completely written based on the GD2 function library. The Jpgraph class library provides a variety of methods for creating various statistical charts, including coordinate charts, bar charts, pie charts, etc. Using the Jpgraph class library simplifies the writing of complex statistical graphs, greatly improves the development rate of developers, and is widely used in today's PHP projects. Installation of Jpgraph Before installing Jpgraph, you first need to download this class

7. An error occurred when using the GD2 function to add text to the photo~

Introduction: An error occurred when using the GD2 function to add text to the photo~

8. What to do when creating a verification code in php

Introduction: PHP creates verification code. I just started to see PHP using GD2 function to create verification code. I encountered a problem. I didn’t understand the last two sentences: $ImageFun='Image'.$type; $ImageFun($ im);What do these two sentences mean? Is $ImageFun a variable? Why does the verification code not display when I comment out the last sentence? Is $ImageFun a function? But I checked the PHP manual, and it seems that there is no such function. I am looking forward to experts

9. Exception occurs when using GD2 function to add text to photos

Introduction: An error occurred when using the GD2 function to add text to the photo. How to solve this error? I tried many methods but nothing worked. !
Warning: imagecreatefromjpeg(/images/photo.jpg): failed to open str

##10. php create Verification code, how to deal with it

#Introduction: PHP creates verification code. I just started to see PHP using GD2 function to create verification code. I encountered a problem. I didn’t understand the last two sentences: $ImageFun='Image'.$type; $ImageFun($im);What do these two sentences mean? Is $ImageFun a variable? Why does the verification code not display when I comment out the last sentence? Is $ImageFun a function? But I checked the PHP manual and it seems that there is no such function. I am looking forward to experts

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