What functions can be used to remove or detect PHP code within a text variable in PHP?

To remove or detect PHP code within a text variable in PHP, you can use functions like `strip_tags()` to remove any HTML and PHP tags, and `preg_replace()` with a regular expression to detect and remove PHP code. Another approach is to use `htmlspecialchars()` to encode special characters in the text variable to prevent PHP code execution. 

// Remove PHP code from a text variable
$text = "<?php echo 'Hello World'; ?> This is a text with PHP code.";
$text = strip_tags($text); // Remove any HTML and PHP tags

// Detect and remove PHP code from a text variable
$text = "<?php echo 'Hello World'; ?> This is a text with PHP code.";
$text = preg_replace('/<\?php(.*?)\?>/s', '', $text); // Remove PHP code

// Encode special characters to prevent PHP code execution
$text = "<?php echo 'Hello World'; ?> This is a text with PHP code.";
$text = htmlspecialchars($text, ENT_QUOTES); // Encode special characters

Keywords

strip_tags preg_replace htmlentities htmlspecialchars eval

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