How to view the current variable type using PHP

This article mainly introduces the method of checking the current variable type in PHP. Friends who need it can refer to it.

The following is the background, process and solution of checking the current variable type in PHP. , the details are as follows:

Solution background

Tossing process one:

The json in PHP has been solved json_decode is not working and there is no output. During this period, you need to understand one thing:

PHP: curl_exec – Manual

curl_exec What is the type of the variable $respJson returned, and whether it is a string type.

Tossing process two:

1. Search:

php check variable type

Reference:

PHP: gettype – Manual

PHP: is_string – Manual

PHP: is_int – Manual

So try it:

$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:

echo gettype($respJson);
echo is_string($respJson);

Result:

输出：string1

This proves that the type of the variable here is indeed It's a string.

Summary

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

To determine whether it is a certain type alone, you can use:

is_int
is_string

Wait.

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