In PHP, you can read a file using the fopen() function to open the file and fread() function to read the contents of the file.
Here is an example code snippet to read a file and output its content:
$file = fopen("example.txt","r");
while(! feof($file))
{
echo fgets($file). "
";
}
fclose($file);
In this example, the fopen() function is used to open the file "example.txt" in read mode, which returns a file pointer. Then, a while loop is used along with feof() function to check whether the end of the file has reached or not. The fgets() function reads a line from the file, and echo statement prints the line on the screen along with an HTML line break. Finally, the fclose() function is used to close the file pointer.