php Read each line until end of file

Im trying to write a php script to read each line of a file, and continue looping until the end of the file is reached, but cannot find out how to detect the end of the file.

Code in vb.net would be:-
        FileOpen(1, "c:\temp.txt", OpenMode.Input)
        While EOF(1) = False
            inputStr = LineInput(1)
        End While

Only code I can really find at the moment, reads the top 3 lines of the file (I know I can repeat it xx times, but the file can be different lengths.

Any help would be appriciated.

Thanks in advance

$myFile = "C:\\phpTest\\testFile.txt";
$fh = fopen($myFile, 'r');
 
$theData = fgets($fh);
echo $theData;
 
$theData = fgets($fh);
echo $theData;
 
$theData = fgets($fh);
echo $theData;

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