php给图片加文字水印
<?php/*给图片加文字水印的方法*/$dst_path = 'http://f4.topitme.com/4/15/11/1166351597fe111154l.jpg';$dst = imagecreatefromstring(file_get_contents($dst_path));/*imagecreatefromstring()--从字符串中的图像流新建一个图像,返回一个图像标示符,其表达了从给定字符串得来的图像图像格式将自动监测,只要php支持jpeg,png,gif,wbmp,gd2.*/$font = './t1.ttf';$black = imagecolorallocate($dst, 0, 0, 0);imagefttext($dst, 20, 0, 10, 30, $black, $font, 'Hello world!');/*imagefttext($img,$size,$angle,$x,$y,$color,$fontfile,$text)$img由图像创建函数返回的图像资源size要使用的水印的字体大小angle(角度)文字的倾斜角度,如果是0度代表文字从左往右,如果是90度代表从上往下x,y水印文字的第一个文字的起始位置color是水印文字的颜色fontfile,你希望使用truetype字体的路径*/list($dst_w,$dst_h,$dst_type) = getimagesize($dst_path);/*list(mixed $varname[,mixed $......])--把数组中的值赋给一些变量像array()一样,这不是真正的函数,而是语言结构,List()用一步操作给一组变量进行赋值*//*getimagesize()能获取到什么信息?getimagesize函数会返回图像的所有信息,包括大小,类型等等*/switch($dst_type){ case 1://GIF header("content-type:image/gif"); imagegif($dst); break; case 2://JPG header("content-type:image/jpeg"); imagejpeg($dst); break; case 3://PNG header("content-type:image/png"); imagepng($dst); break; default: break; /*imagepng--以PNG格式将图像输出到浏览器或文件 imagepng()将GD图像流(image)以png格式输出到标注输出(通常为浏览器),或者如果用filename给出了文件名则将其输出到文件*/}imagedestroy($dst);?>
钟志远 江苏南京 904727147

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.
