Does the string
["first","second","third"]
always preserve array order and result in the PHP array
array('first','second','third');
when using json_decode()? I realize the answer is NO for objects, but I am asking about a string representing an array as input.
分享 Yes. Arrays are ordered by definition, and JSON preserves this.
The JSON specification says:
An array structure is a pair of square bracket tokens surrounding zero or more values. The values are separated by commas. The order of the values is significant.
The last sentence implies that a JSON encoder or decoder that changes the order is not in conformance with the specification. I can't find anything in the PHP documentation that explicitly says that it observes this requirement, but I think it can be assumed since it claims to be implementing JSON.
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