I have a very simple PHP code which should read a binary file, but it doesn't work:
<?php
$fid = fopen("sampleMdl.bin","rb");
echo "No. parts: " . fread($fid, 2) . "<br/>";
fclose($fid);
?>
The first 2 bytes of sampleMdl.bin contain the integer 2. But the page displays nothing after "No. parts:". Is there actually any setting in the server that avoids PHP to read binary file?
You read a binary integer.
$bytes = fread($fld, 2);
$n = $bytes[0] | ($bytes[1] << 8); // The number
This is a little endian format; it could also be the other way around, big endian:
$n = $bytes[1] | ($bytes[0] << 8); // The number
In this case negative numbers do not happen, so this suffices.
Found the solution already by using a combination of unpack() and array_values():
<?php
$fid = fopen("sampleMdl.bin", "rb");
$NA = array_values(unpack("Sshort", fread(fid, 2)));
echo "No. parts: " . $NA[0] . "<br/>";
fclose($fid);
?>
Where the first 2 bytes of sampleMdl.bin is 02 00.
02 00are in the file) If this is the case, then you need to interpret the bytes as integers. Otherwise PHP is going to assume strings. Or is it ASCII (The bytes30 32= "02" are in the file).bin2hex(fread($fid, 2))for a change.