How to determine whether it is an array in php

In PHP, there are many ways to determine whether a variable is an array, which are introduced one by one below.

Method 1: is_array function

The is_array function is the most commonly used method in PHP to determine whether a variable is an array. The usage of the is_array function is as follows:

$is_array = is_array($variable);

Among them, $variable represents the variable to be judged.

The return value of the is_array function is of boolean type (true or false). If $variable is an array, it returns true, otherwise it returns false.

The following is an example:

$data = ['apple', 'banana', 'pear'];
$is_array = is_array($data); //true

Method 2: gettype function

The gettype function can return the type of the variable. The usage method is as follows:

$type = gettype($variable);

Among them, $variable represents the variable to be judged.

If the value of $type is "array", it means that $variable is an array type, otherwise it is not an array type.

The following is an example:

$data = ['apple', 'banana', 'pear'];
$type = gettype($data); //"array"

Method 3: Use built-in functions

In addition to the methods mentioned above, PHP also provides some built-in functions to determine variable types.

For example, if you want to check whether a variable is an array, you can use the following function:

1. is_array();
2. is_callable();
3. is_float();
4. is_int();
5. is_null();
6. is_numeric();
7. is_object();
8. is_resource();
9. is_scalar();
10. is_string();

The is_array() function can determine whether a variable is an array type. The usage method is the same as described above:

$is_array = is_array($variable);

The usage method of other functions is similar to this.

The following is an example:

$data = ['apple', 'banana', 'pear'];
$is_array = is_array($data); //true

Summary

In PHP, there are many ways to determine whether a variable is an array, the most commonly used method is to use the is_array function, others Methods include using the gettype function and some built-in functions. No matter which method is used, you can easily determine whether a variable is an array type, and you can choose the appropriate method according to your needs.

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