PHP：防止 json_encode 将 float 转换为 int

Question

I need to pass the amount in the form of decimals as in 50.00 to an API but when the amount is json_encoded it converts the amount to int 50.

Sample code:

echo json_encode(['amount' => 50.00]);

This displays

{"amount":50}

I need the amount to stay as 50.00 itself. How do I do this?

Answer 1

You may try to use JSON_PRESERVE_ZERO_FRACTION flag to make sure, that float values are always encoded as a float value. Note, that this option is available starting from PHP 5.6.6.

<?php
echo json_encode(['amount' => 50.00], JSON_PRESERVE_ZERO_FRACTION);
?>

Note, that although JSON_PRESERVE_ZERO_FRACTION is an option, the result (as @NigelRen mentioned in the comment) is 50.0 , not 50.00 .