关于使用文本域(TextArea)的一个问题
问题
我在使用表单处理信息时发现,对文本域的处理不正确。例如下面的一个表格:
---------------------------------------------------------------
test.html
test.php
$fp=fopen($filename, "w");
fwrite($fp, $content);
fclose($fp);
echo "OK";
?>
------------------------------------------------------
上面的例子是用来测试的,主要是想完成用户可以输入一个文件名,然后可以输入文件的内容。确认后可以在服务器上保存文件。下面简单地说明一个两个文件的内容。
test.html 中有一个表单,里面有一个文本框和一个文本域。文本框用来输入要保存的文件名,文本域
用来输入文件的内容。文件名缺省设为"test.txt",文件内容缺省设为"aaa" \"bbb\"。表单的动作为"post",执行文件为"test.php"。
test.php则很简单。打开指定文件,写入文件内容,关闭文件,输出"OK"。
原来我想文件内容应该是"aaa" \"bbb\",但结果并不是这样,而是\"aaa\" \\\"bbb\\\"!在每一个双引号(")和反斜线(\)(其实还有单引号和空(nul))前都加上了一个转义用的反斜线。这是为什么? 于是,我查询了PHP中文手册,看到关于PHP.ini的配置中关于magic_quotes_gpc和magic_quotes_runtime的说明,我知道了是因为PHP给自动处理了。这样,我就将PHP.ini配置中的magic_quotes_gpc和magic_quotes_runtime
设成了off,结果就正确了。
但是如果服务器我无法改动怎么办?于是又查阅了一下字串符处理函数,我发现stripslashes()函数就可以完成这个工作。这样首先把PHP.ini改成原来的样子,再修改test.php如下:
--------------------------------------------------
$fp=fopen($filename, "w");
$content=stripslashes($content);
fwrite($fp, $content);
fclose($fp);
echo "OK";
?>
--------------------------------------------
再检查结果,完全符合我的需要!
还有要注意的是,如果你想做一个修改文件内容的应用。如,首先把文件内容读出来,放入到文本域中,用户可以进行修改。那么当文件中有特殊的符号,如"","&" 符等,直接显示就会与实际内容不符。没关系,PHP还提供了htmlspecialchars()函数将特殊字符转换成HTML 的字串格式,这样显示与处理都是正确的了。
这是我在处理文本域时发现的一个问题,希望能对你有帮助!

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











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,

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.

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

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 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 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

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.
