1. First create a new PHP document and define an array, such as $ arr = array ("I ","have ","an ","apple ").

2. Use the embed () function to convert the array into a string. Example: $ str = embed ($ arr).

3. Print the string after array conversion, for example: echo $str.

4. Save the above content and view the preview in the browser.

5. The function embed () has an optional delimiter parameter, which can specify an array element delimiter (if no delimiter is specified, the default is a null character). Example: $ str = embed ("++ ",$ arr).

6. Print a delimited string and convert the php array into a string.