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      Dumps information about a variable

      var_dump

      (PHP 4, PHP 5)

      var_dump — Dumps information about a variable

      Description

      void var_dump ( mixed $expression [, mixed $expression [, $... ]] )

      This function displays structured information about one or more expressions that includes its type and value. Arrays and objects are explored recursively with values indented to show structure.

      In PHP 5 all public, private and protected properties of objects will be returned in the output.

      Tip

      As with anything that outputs its result directly to the browser, the output-control functions can be used to capture the output of this function, and save it in a string (for example).

      Parameters

      expression

      The variable you want to export.

      Return Values

      No value is returned.

      Examples

      Example #1 var_dump() example

      <?php
      $a 
      = array(12, array("a""b""c"));
      var_dump($a);
      ?>

      The above example will output:

      array(3) {
        [0]=>
        int(1)
        [1]=>
        int(2)
        [2]=>
        array(3) {
          [0]=>
          string(1) "a"
          [1]=>
          string(1) "b"
          [2]=>
          string(1) "c"
        }
      }
      
      <?php

      $b 
      3.1;
      $c true;
      var_dump($b$c);

      ?>

      The above example will output:

      float(3.1)
      bool(true)
      


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