The 2 functions "Explode" and "Implode"; are both used in the splitting of a string into several pieces or the joining of an array together. For those of you familiar with JS, \"Explode\" is very similar to \"innerHTML.Split\". The syntax of \"Explode\" is:

Explode ( Split By , String ) ;

<?php 
    $strString = "Text;Some Text;More Text" ; 
    $strArray = Explode ( ";\" , $strString ) ; 
?> 

In this example \"Explode\" takes the string and splits it into several pieces by \";\" creating an array with 3 items. If these were echoed...

<?php 
    Echo ( $strArray [ 0 ] ) ; // Gives \"Text\" 
    Echo ( $strArray [ 1 ] ) ; // Gives \"Some Text\" 
    Echo ( $strArray [ 2 ] ) ; // Gives \"More Text\" 
?> 

Now \"Implode\" can be used to reverse this, the syntax of which is:

Implode ( Join With , Array ) ;

<?php 
    $strArray = Array ( "Text\" , \"Some Text\" , \"More Text\" ) ; 
    $strString = Implode ( \";\" , $strArray ) ; 
?>

In this example Implode takes the array and joines it together as a string with \";\" inbetween each piece of text. If this was echoed...

<?php Echo ( $strString ) ; // Gives \"Text;Some Text;More Text\" ?>

Final Notes: The function \"Join\" is exactly the same as \"Implode\" thus...

<?php 
    $strString = Join ( ";\" , $strArray ) ; 
    $strString = Implode ( \";\" , $strArray ) ; 
?>

... Do exactly the same thing.