What potential issues could arise when using fwrite in PHP, specifically when writing variable content to a file?

One potential issue when using fwrite in PHP to write variable content to a file is that the content may contain special characters that could break the file formatting or cause unexpected behavior. To solve this issue, you can use the htmlspecialchars function to escape special characters before writing the content to the file. 

$content = "<h1>Hello, world!</h1>";
$escaped_content = htmlspecialchars($content, ENT_QUOTES);
$file = fopen("file.txt", "w");
fwrite($file, $escaped_content);
fclose($file);

Keywords

fwrite PHP variable content file writing errors

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