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.