Entry

Please explain the functions print_r and var_dump.

Apr 9th, 2001 12:39
Philip Olson, Ben Udall,

Descriptions (from manual)      :
---------------------------------  
  print_r  -- Prints human-readable information about a variable
              (PHP 4)
  var_dump -- Dumps information about a variable
              (PHP 3 >= 3.0.5, PHP 4)
An example                      :   
---------------------------------  
<pre>
<?php
  $example = array ('str'           => 'is good',
                    'letters'       => array ('a','b','c'),
                    'integer'       => 31,
                    'float/double'  => 35.3787,
                     24             => 'hello');
  echo 'print_r  :'. "\n\n";
  print_r  ($example);
  echo 'var_dump :'. "\n\n";
  var_dump ($example);
?>
</pre>
Output (layout altered)         :
---------------------------------
print_r  :
Array
(
    [str]           => is good
    [letters]       => Array
                       (
                           [0] => a
                           [1] => b
                           [2] => c
                       )
    [integer]       => 31
    [float/double]  => 35.3787
    [24]            => hello
)
var_dump :
array(4)
{
    ["str"]         => string(7) "is good"
    ["letters"]     => array(3)
                       {
                           [0] => string(1) "a"
                           [1] => string(1) "b"
                           [2] => string(1) "c"
                       }
   ["integer"]      => int(31)
   ["float/double"] => float(35.3787)
   [24]             => string(5) "hello"
}
Manual Entries                  :
---------------------------------
  http://www.php.net/manual/en/function.print-r.php
  http://www.php.net/manual/en/function.var-dump.php
Initially posted on php-general :
---------------------------------  
  http://marc.theaimsgroup.com/?l=php-general&m=98684689426976&w=2