How do I check if a variable is an array in PHP?

How do I check if a variable is an array in PHP?

The is_array() function checks whether a variable is an array or not. This function returns true (1) if the variable is an array, otherwise it returns false/nothing.

Which function will return true if a variable is an array?

4. Which of the following PHP function will return true if a variable is an array or false if it is not an array? Explanation: The function is_array() is an inbuilt function in PHP which is used to check whether a variable is an array or not. Its prototype follows: boolean is_array(mixed variable).

How do you check if a variable is true or false in PHP?

PHP | is_bool() The is_bool() function is used to find whether a variable is an a boolean or not. Syntax: boolean is_bool($variable_name) $variable_name:the variable we want to check. return value: It is a boolean function so returns TRUE when $variable_name is a boolean value, otherwise FALSE.

How do you check if a variable is array or not?

Another method to check a variable is an array is by checking it’s constructor with Array. This becomes true if the variable is same as what is specified (here an Array) and false if it is not.

What is the correct way of creating an array?

Array declaration syntax is very simple. The syntax is the same as for a normal variable declaration except the variable name should be followed by subscripts to specify the size of each dimension of the array. The general form for an array declaration would be: VariableType varName[dim1, dim2.

Is 1 true in PHP?

Value 0 and 1 is equal to false and true in php.

How to check if a variable is an array in PHP?

Finds whether the given variable is an array. The variable being evaluated. Returns true if value is an array , false otherwise. echo is_array($yes) ? ‘Array’ : ‘not an Array’; echo is_array($no) ? ‘Array’ : ‘not an Array’; The above example will output: Please note that the ‘cast to array’ check is horrendously out of date.

How to check if a variable returns true in PHP?

Testing $var == true is the same than just testing $var. You can read this SO question on comparison operator. You can also read PHP manual on this topic. Note: a variable does not return true. It is true, or it evaluates to true. However, a function returns true.

How to check if multiple values are all true in PHP?

A simple loop will do. Mind that if the array is empty, both conditions are met (all false and all true). You won’t see this in the result, because of the else, but you can find out yourself how you want to handle this. Note: if you have other values in the array they will be converted to boolean according to the horrific conversion rules of PHP.

What’s the difference between true and false in PHP?

In such cases you have to explicitly check if the value is != 0 or to explicitly convert the value to int also, not only to boolean. PHP does not break any rules with the values of true and false. The value false is not a constant for the number 0, it is a boolean value that indicates false.