Are there any security considerations to keep in mind when fetching and displaying external content in PHP?

When fetching and displaying external content in PHP, it is important to consider security risks such as cross-site scripting (XSS) attacks. To mitigate these risks, you should always sanitize and validate any external content before displaying it to users. This can be done by using functions like htmlspecialchars() to escape special characters and prevent malicious code execution. 

// Fetch external content
$external_content = file_get_contents('https://example.com/data');

// Sanitize and display external content
echo htmlspecialchars($external_content);

Keywords

Cross-site scripting Content Security Policy htmlspecialchars cURL SQL injection

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