Php find key in array

Php key in array exists

<?php
$search_array = array('first' => null, 'second' => 4);

// returns false
isset($search_array['first']);

// returns true
array_key_exists('first', $search_array);
?>

Source: php.net

Array_search in php

<?php
$array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red');

$key = array_search('green', $array); // $key = 2;
$key = array_search('red', $array);   // $key = 1;
?>

Source: php.net

Php key 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);

Php find key in array

<?php
$search_array = array('first' => 1, 'second' => 4);
if (array_key_exists('first', $search_array)) {
    echo "The 'first' element is in the array";
}
?>

Get key of array element php

$people = array(
  2 => array(
    'name' => 'John',
    'fav_color' => 'green'
  ),
  5=> array(
    'name' => 'Samuel',
    'fav_color' => 'blue'
  ));
$found_key = array_search('blue', array_column($people, 'fav_color'));

Get array key based on value php

$array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red');

$key = array_search('green', $array); // $key = 2;
$key = array_search('red', $array);   // $key = 1;

Source: stackoverflow.com

Similar codes

0 vote336 views1 answer
Laravel value eloquent
PHP Laravel
0 vote306 views1 answer
Create a button add in laravel
PHP
3 votes352 views2 answers
Laravel carbon created_at date in current month
PHP Laravel
16 votes287 views5 answers
Laravel blade for loop
PHP
0 vote340 views1 answer
Laravel factory get foreign key
PHP Laravel
35 votes327 views6 answers
Laravel make auth
PHP Laravel
1 vote332 views1 answer
Img src php wordpress
PHP Wordpress
0 vote276 views1 answer
Cross-site request forgery validation failed. Required param "state" missing from persistent data
PHP
3 votes300 views3 answers
Php remove everything after character
PHP
0 vote329 views1 answer
Laravel 8 clear compiled class files
PHP