PHP Looping (Cont.)

The do...while Statement
The do...while statement will execute a block of code at least once—it then will repeat the loop as long as a condition is true. 
do {
  code to be executed;
} while ( condition );

This program breaks a string into an array of words, in which two words are separated by one and only one space, by using the function explode(separator,string):
  • separator specifies where to break the string.
  • string—the string to split 
 <html><body>
 <?php
  $sep = "";
  $str = trim( "" );
  $word = explode( $sep, $str );
  $i = 0;
  do
   if ( $i ==  )   echo $word[$i];
  while ( strlen( $word[++$i] ) != 0 );
 ?>
 </body></html>
Output =      

The for Statement 
for ( initialization; condition; increment ) {
     code to be executed;  }

The for statement is used when you know how many times you want to execute a statement or a list of statements.
  • The sleep(seconds) function delays execution of the current script for a specified number of seconds.

  • Use the function date(format,timestamp) for the format, e.g., 
    February 08th, 2013, 11:26:05
 
 <html><body>
 <?php
  $number =  
  for ( $i=1;  $i<=$number; $i++ ) {
   sleep( $i );
   echo gmdate( '' )."<br />"; 
  }
 ?>
 </body></html>