How to Efficiently Get Body Contents from a Guzzle 6 PSR-7 Response?

Getting Body Contents from a PSR-7 Response in Guzzle 6

In Guzzle 6, responses adhere to the PSR-7 standard, which utilizes Streams for storing response bodies. To retrieve the body contents, one must retrieve the Stream and subsequently obtain its contents.

Methods for Retrieving Body Contents:

• Casting to String:

  $contents = (string) $response->getBody();

• getContents():

  $contents = $response->getBody()->getContents();

Difference between getContents() and Casting:

getContents() returns the remaining stream contents. Subsequent calls to getContents() will return an empty string unless the stream position is reset. Casting, on the other hand, reads all stream data from the beginning to the end.

Example:

$stream = $response->getBody();
$contents = $stream->getContents(); // contents are retrieved
$contents = $stream->getContents(); // returns empty string
$stream->rewind(); // seek the stream back to the beginning
$contents = $stream->getContents(); // contents are retrieved again

Casting to a string performs a single reading operation and returns all data from the stream.

$contents = (string) $response->getBody(); // contents are retrieved
$contents = (string) $response->getBody(); // contents are retrieved again

Documentation:

• https://docs.guzzlephp.org/en/latest/psr7.html#responses

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