Getting a file pointer from file descriptor

In PHP 5.2.3, "fdopen" was used to read/write to a file descriptor that's open开发者_如何学Ced by another application.

fdopen(<fileDescriptorId>,"rw");  //It worked fine with PHP 5.2.3

After upgrading PHP to 5.3.2, it's throwing "undefined reference to 'fdopen' function".

Please suggest whats the replacement for this in PHP 5.3.2 or any workaround.

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As of PHP 5.3.6 (and still valid and working with PHP 7.2.1), the proper method to access a file descriptor is to use fopen with php://fd:

$fd = 3;
$pipe = fopen("php://fd/{$fd}", 'w');
fwrite($pipe, 'hello!');

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Could this fdopen() of yours have been provided by a custom php extension?
On a linux/unix server

function fdopen($id, $mode) {
  return fopen("/proc/self/fd/".(int)$id, $mode);
}

might work.

edit: see http://linux.die.net/man/5/proc

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The fdopen is related to C language. There is no such function in PHP. I think you have mis-typed the PHP's fopen function, right?