PHP Whether the searched value is present in the array - in_array

Colleagues hello to all.

In today's article, we'll look at a special function in PHP that helps determine if a value exists in an array. The function returns TRUE if the given value is found in the array, and FALSE if not found.

Function syntax.

in_array(mixed $value, array $array, bool $strict = false)

• $value - The initial value we want to find in the array.
• $array - The array itself in which we will look for values.
• $strict - Case sensitive, case insensitive by default.

To be honest, I've been using this feature for years, but case sensitivity never worked for me, so it's not certain that the  $strict setting works at all.

In the example, we will search for the values ​​kiev in the array of countries.

$country = ['Kiev', 'Poltava', 'America', 'moldova'];
if (in_array('kiev', $country)) {
    echo "TRUE";
} else {
    echo "FALSE";
}

As a result, we got FALSE, the value was not found. We get FALSE because the lookup value kiev has a lowercase first character.

In the next example, we will use the same example, but the searched value will be the same as in the array.

$country = ['Kiev', 'Poltava', 'America', 'moldova'];
if (in_array('Kiev', $country)) {
    echo "TRUE";
} else {
    echo "FALSE";
}

As a result, we received TRUE, the values ​​were successfully found.

Thank you all, I hope that my article helped you in some way.