In PHP, you can get the index of an element in an array using the array_search() function. The array_search() function returns the key of the first matched element in the array. Here's an example:
$fruits = array("apple", "banana", "cherry");
$index = array_search("banana", $fruits);
echo "The index of banana is: " . $index;
//Output: The index of banana is: 1
In this example, we have an array of fruits and we want to get the index of the banana element. We use the array_search() function to search for the banana element in the fruits array and assign the returned index to the $index variable. Finally, we print the result.
If the element you are searching for is not found in the array, the array_search() function will return false. In that case, you can check for the false value to confirm if the element is not present in the array. Here's an example:
$fruits = array("apple", "banana", "cherry");
$index = array_search("pear", $fruits);
if ($index !== false) {
echo "The index of pear is: " . $index;
} else {
echo "Pear not found in the fruits array!";
}
//Output: Pear not found in the fruits array!
In this example, we are searching for the "pear" element in the fruits array which is not present in the array. Therefore array_search() will return false. We use an if condition to check if the returned value is not equal to false and print the result accordingly.