使用PHP的fwrite函数将内容写入文件

使用PHP的fwrite函数将内容写入文件的代码如下：

<?php
$file = "example.txt";
$content = "This is an example content.";

$handle = fopen($file, "w");

if ($handle) {
    fwrite($handle, $content);
    fclose($handle);
    echo "Content has been written to the file.";
} else {
    echo "Unable to open the file.";
}
?>

以上代码将创建一个名为"example.txt"的文件，并将"This is an example content."写入该文件中。在成功写入内容后，会显示"Content has been written to the file."。如果无法打开文件，则会显示"Unable to open the file."。