How to join Elements of Array in PHP

In this tutorial, you shall learn how to join elements of an array into a string in PHP using implode() function, with example programs.

PHP Join elements of array

To join elements of an array in PHP, use implode() String function. implode(separator, array) returns a string with the elements or array joined using specified separator.

Examples

1 Join elements of integer array

In the following example, we take an array of numbers, and join the elements of this array, using hyphen - as separator between the elements of array.

PHP Program

<?php
$arr = array(5, 2, 9, 1);
$output = implode("-", $arr);
printf("Output : %s", $output);
?>

Output

2 Join elements of string array

In the following example, we take an array of strings, and join the elements of this array, using comma , as separator between the elements of array.

PHP Program

<?php
$arr = array("apple", "banana", "cherry");
$output = implode(",", $arr);
printf("Output : %s", $output);
?>

Output

Conclusion

In this PHP Tutorial, we learned how to join elements of an array into a string, using implode() function, with examples.