What is the significance of UTF-8 BOM in PHP when reading data from a .txt file?

The UTF-8 BOM (Byte Order Mark) is a sequence of bytes at the beginning of a text file that indicates the file is encoded in UTF-8. When reading data from a .txt file in PHP, the presence of a UTF-8 BOM can cause issues such as unexpected characters appearing in the output. To solve this issue, you can check for the presence of the BOM and remove it before processing the file contents. 

// Read the contents of the file
$content = file_get_contents('file.txt');

// Check for UTF-8 BOM and remove it if present
if (substr($content, 0, 3) == "\xEF\xBB\xBF") {
    $content = substr($content, 3);
}

// Process the file contents
echo $content;

Keywords

UTF-8 BOM PHP .txt file reading data significance

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