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This article mainly shows you "what are the common mistakes of json_decode () in php?" the content is simple and clear. I hope it can help you solve your doubts. Let me lead you to study and learn what are the common mistakes of json_decode () in php.

Common errors of json_decode ()

The following three ways of writing json are all wrong. Can you see where they are wrong?

$bad_json = "{'bar':' baz'}"; $bad_json ='{bar: "baz"}'; $bad_json ='{"bar": "baz",}'

Executing json_decode () on all three strings returns null with an error.

The first mistake is that the json delimiter (delimiter) allows only double quotes, not single quotes. The second error is the "first name" of the json name-value pair (the part to the left of the colon), and double quotation marks must be used in all cases. The third error is that you cannot add a comma (trailing comma) after the last value.

In addition, json can only be used to represent objects (object) and arrays (array), and if you use json_decode () for a string or numeric value, null will be returned.

Var_dump (json_decode ("Hello World")); / / the above are all the contents of the article "what are the common mistakes of json_decode () in php?" Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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