PHP

php array index exists

// Here's our fruity array
$fruits = ['apple', 'pear', 'banana'];

// Use it in an `if` statement
if (array_key_exists("banana", $fruits)) {
 // Do stuff because `banana` exists
}

// Store it for later use
$exists = array_key_exists("peach", $fruits);

// Return it directly
return array_key_exists("pineapple", $fruits);

check if index exists in array php

// Here's our data array
$data = ['email', 'phone', 'name'];

// Use it in an `if` statement
if (array_key_exists("email", $data)) {
 // Do stuff because `email` exists
}

php array check value exists

if( in_array( "bla" ,$yourarray ) )
{
    echo "has bla";
}