PHP

php array join

$arr = array('Hello','World!','Beautiful','Day!');
echo join(", ",$arr);

join array in php as string

implode("",$arr);

join array of strings php

$arr = array('Hello','World!','Beautiful','Day!');
echo join(",",$arr);

php join

// from PHP 8.0 (order parameters has been changed)
$arr = array('Hello','World!','Beautiful','Day!');
echo join($arr, ", ");

array join pgp

<?php 
// implode ( string $separator , array $array ) 

$res = implode ( ",", $array ); 

?>

php inner join array

$array1 = [1, 5, 64, 2, 6];
$array2 = [2, 1, 8, 3];

//Method 1:
array_filter($array1, function($_){
    global $array2;
  return in_array($_, $array2);
}); // Output: [0 => 1, 3 => 2]

//Method 2:
array_intersect($array1, $array2); //Output: [0 => 1, 3 => 2]