Home php教程 php手册 PHP给图片加数字水印出现中文乱码的解决

PHP给图片加数字水印出现中文乱码的解决

Jun 13, 2016 am 10:46 AM
php Chinese Garbled characters Appear add picture number watermark of solve

$textcolor = imagecolorallocate($img, 255, 0, 0); //设置水印字体颜色 
        $font = 'c:/windows/fonts/simhei.ttf'; //定义字体 
        $text = iconv("GB2312", "UTF-8", $waterImageUrl); //将中文字转换为UTF8 
        imagettftext($img, 20, 10, 50, 40, $textcolor, $font, $text);//将文字写到图片中 
        $this->outputImage($img, $this->getExtendsName($imageUrl), $imageUrl); 
        imagedestroy($img);///销毁图像  

 很多情况下,问题是这样解决地,可是,你别忘记了,还有特殊情况,那就是你设置了php页编码的情况,比如:header( "Content-Type:text/html; charset=UTF-8 ");
,嗯,这时候,你还用这个方式,那就死翘翘了,一样会乱码,为什么,因为本来就已经是UTF-8,你转什么啊?不乱才怪,这时候,可以将第三行去掉,直接将imagettftext方法中的$text改为$waterImageUrl,当然,还有更加特殊的情况,那就是,你传值的页面是别的编码,而非UTF-8,那估计又有文章,所以,我奉劝各位学PHP的朋友,最好保证你的网站中每个页面编码一致,这样,问题解决起来方便很多。
还是贴下代码吧,怕有些人不知道, www.2cto.com

$textcolor = imagecolorallocate($img, 255, 0, 0); //设置水印字体颜色 
        $font = 'c:/windows/fonts/simhei.ttf'; //定义字体 
        //$text = iconv("UTF-8", "UTF-8", $waterImageUrl); //将中文字转换为UTF8 
        //实际上可以看到,这里可以不用转,因为我在前面的index.php文件中已经设置了编码为UTF-8,如果 
        //写为//$text = iconv("GB2312", "UTF-8", $waterImageUrl); 反而会出现乱码 
        $text = $waterImageUrl; 
        imagettftext($img, 20, 10, 50, 40, $textcolor, $font, $text);//将文字写到图片中 
        $this->outputImage($img, $this->getExtendsName($imageUrl), $imageUrl); 
        imagedestroy($img);///销毁图像  


摘自 0+0+0+...=1
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

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

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? Apr 03, 2025 am 12:03 AM

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

PHP and Python: Comparing Two Popular Programming Languages PHP and Python: Comparing Two Popular Programming Languages Apr 14, 2025 am 12:13 AM

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: A Key Language for Web Development PHP: A Key Language for Web Development Apr 13, 2025 am 12:08 AM

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

Explain the match expression (PHP 8 ) and how it differs from switch. Explain the match expression (PHP 8 ) and how it differs from switch. Apr 06, 2025 am 12:03 AM

In PHP8, match expressions are a new control structure that returns different results based on the value of the expression. 1) It is similar to a switch statement, but returns a value instead of an execution statement block. 2) The match expression is strictly compared (===), which improves security. 3) It avoids possible break omissions in switch statements and enhances the simplicity and readability of the code.

What is Cross-Site Request Forgery (CSRF) and how do you implement CSRF protection in PHP? What is Cross-Site Request Forgery (CSRF) and how do you implement CSRF protection in PHP? Apr 07, 2025 am 12:02 AM

In PHP, you can effectively prevent CSRF attacks by using unpredictable tokens. Specific methods include: 1. Generate and embed CSRF tokens in the form; 2. Verify the validity of the token when processing the request.

PHP in Action: Real-World Examples and Applications PHP in Action: Real-World Examples and Applications Apr 14, 2025 am 12:19 AM

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.

See all articles