Found a total of 10000 related content
What is the difference between htmlspecialchars and htmlentities in PHP
Article Introduction：htmlspecialchars only encodes a few key HTML special characters to prevent XSS attacks and is suitable for user input processing; htmlentities encodes characters of all available HTML entities, suitable for multilingual content. For example, htmlspecialchars will escape, ",' (requires ENT_QUOTES), &, and htmlentities will also encode, such as é in café as é. When selecting, if you need to be secure and non-ASCII encoding, use htmlspecialchars, and if you need to be compatible with old systems or multiple languages, use htmlentities, and always specify UTF-8
2025-07-11
comment 0
390
PHP htmlspecialchars to prevent XSS
Article Introduction：XSS is a cross-site scripting attack that steals cookies or hijacks the session by inserting malicious scripts; htmlspecialchars() can escape special characters into HTML entities to prevent the browser from executing. 1.XSS often occurs when user input is directly displayed, such as comments, search boxes, etc.; 2.htmlspecialchars() avoids execution by escaping characters such as, &, etc.; 3. Correct use includes: always escape the output content, specify the encoding as UTF-8, not escape data before storage, and select processing methods according to the context; 4. Easily ignored points include: quotation marks are required to be closed in HTML attributes, rich text needs to be used with whitelist filters, and json_e should be used in JavaScript.
2025-07-11
comment 0
495
Explain Cross-Site Scripting (XSS) and how to prevent it in PHP (htmlspecialchars).
Article Introduction：XSS is an attack that is executed in the user's browser by injecting malicious scripts. Using the htmlspecialchars function in PHP can effectively prevent XSS attacks: 1) htmlspecialchars converts special characters into HTML entities to prevent browsers from interpreting them as code; 2) When using in HTML attributes, quotation marks must be escaped using the ENT_QUOTES flag; 3) Combining other security measures, such as input verification and output encoding, multi-level protection is formed.
2025-04-08
comment 0
876
Working with Strings in PHP
Article Introduction：PHP often uses dot styling, sprintf formatting, strpos search, str_replace replacement, trim cleaning, htmlspecialchars anti-XSS, and urlencode encoding. 1. Use . or sprintf() for splicing; 2. Use strpos() for search, and replace str_replace() for str_replace(); 3. Use trim(), strip_tags(), and htmlspecialchars() for cleaning; 4. Use mb_convert_encoding() for encoding and conversion, and use urlencode()/urldecode() for URL encoding and decoding.
2025-07-15
comment 0
816
How Do I Protect Against Cross-Site Scripting (XSS) in PHP?
Article Introduction：This article details securing PHP applications against Cross-Site Scripting (XSS) attacks. It emphasizes a multi-layered defense using input validation (e.g., filter_input(), filter_var()), output encoding (htmlspecialchars()), and secure coding pra
2025-03-10
comment 0
622
How to Protect Against Cross-Site Scripting (XSS) in PHP 8?
Article Introduction：This article details how to prevent Cross-Site Scripting (XSS) vulnerabilities in PHP 8. It emphasizes a multi-layered approach combining input validation (using filter_var()), context-aware output encoding (htmlspecialchars(), json_encode()), and s
2025-03-10
comment 0
682
