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PHP Control Flow (while)

While             The  while function is the simplest of all the iterative control statements.  The statement list within a while statement is repeated as long as the condition evaluated has not been met.  The statement list within the while code body can consist of one or more statements. while (expression)  {     -- statements that execute while the expression evaluates false } It is a best practice to build error detecting logic into any iterative control statement.  This error control logic should be built in such a way as to detect an infinite loop. In the following example, simple logic has been built into a while function to detect an infinite loop error: <?php     $i = 5;     while ($i < 5) {         echo '$i <br>';         $i = $i++;         if ($i > 20000) { // Break when > 20,000 repititions             break;         }     } ?> Do ... While      The do ... while function is based on the while iterative control statem