PHP Method for viewing the current variable type _ php instance

This article mainly introduces how to view the current variable type in PHP, you can refer to the following section to view the background, process, and solution of the current variable type in PHP. The details are as follows:

Background

Tossing process 1:

Solved json json_decode in PHP and no output

During this period, you need to understand one:

The Code is as follows:

PHP: curl_exec-Manual

The variable $ respJson returned by curl_exec is of the string type.

Tossing process 2:

1. Search:

The Code is as follows:

Php check variable type

Refer:

PHP: gettype-Manual

PHP: is_string-Manual

PHP: is_int-Manual

So try:

The Code is as follows:

$ RespJson = $ crifanLib-> getUrlRespHtml ($ getTokenUrl );
$ CrifanLib-> logWrite ("respJson = % s", $ respJson );
Echo gettype ($ respJson );
Echo is_string ($ respJson );
Echo "before decodedJsonObj ";
$ DecodedJsonObj = json_decode ($ respJson );

Result:

Still no output...

2. Try:

The Code is as follows:

Echo gettype ($ respJson );
Echo is_string ($ respJson );

Result:

The Code is as follows:

Output: string1

It proves that the type of the variable here is indeed string.

Summary

The variable type obtained in PHP is gettype ($ var );

It is determined to be of a specific type. You can use:

The Code is as follows:

Is_int
Is_string

And so on.

The above is the method for viewing the current variable type in PHP. I hope you will like it.