Search results for: "dangerous characters"

When should strip_tags be used instead of str_replace to prevent script injection in PHP?

To prevent script injection in PHP, strip_tags should be used instead of str_replace when you want to remove all HTML tags from a string. Strip_tags i...

How can PHP functions like htmlentities, htmlspecialchars, and strip_tags help mitigate the risks associated with user-input HTML code?

When users input HTML code into a form on a website, it can pose security risks such as cross-site scripting (XSS) attacks. PHP functions like htmlent...

How can special characters be converted back to non-special characters in PHP?

Special characters in PHP can be converted back to non-special characters using the htmlspecialchars_decode() function. This function converts special...

What measures can be taken to prevent syntax errors and unexpected behavior when using PHP eval function in a web application?

When using the PHP eval function in a web application, it is important to sanitize and validate the input string before passing it to eval to prevent...

In what scenarios would extracting filenames from PDF attachments using PHP pose potential security risks or limitations?

Extracting filenames from PDF attachments using PHP can pose security risks if the filenames are not properly sanitized or validated. This could poten...