How to get array key in php

Get key of value array 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

Array key value php

<?php
$age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43");
foreach($age as $x=>$x_value)
  {
  echo "Key=" . $x . ", Value=" . $x_value;
  echo "<br>";
  }
?>

Php keys of array

$array = array(0 => 100, "cor" => "vermelho");
print_r(array_keys($array));

$array = array("azul", "vermelho", "verde", "azul", "azul");
print_r(array_keys($array, "azul"));

$array = array("cor"     => array("azul", "vermelho", "verde"),
               "tamanho" => array("pequeno", "medio", "grande"));
print_r(array_keys($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'));

Php get keys and values from array

foreach($yourArray as $key => $value) {
    echo '<a href="' . $value . '">' . $key . '</a>';
}

// OR

//Use functions
key($array);     //Returns current key
reset($array);   //Moves array pointer to first record
current($array); //Returns current value
next($array);    //Moves array pointer to next record and returns its value
prev($array);    //Moves array pointer to previous record and returns its value
end($array);     //Moves array pointer to last record and returns its value

Source: stackoverflow.com

How to get array key in php

<?php
$array = array(
    'fruit1' => 'apple',
    'fruit2' => 'orange',
    'fruit3' => 'grape',
    'fruit4' => 'apple',
    'fruit5' => 'apple');

// this cycle echoes all associative array
// key where value equals "apple"
for($i = 0; $i< sizeof($array);$i++){
if (key($array[$i]) == 'apple') {
        echo key($array).'<br />';
    }
    //next($array);
}
?>

Source: php.net

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