var_dump(3) [php man page]

VAR_DUMP(3)								 1							       VAR_DUMP(3)

var_dump - Dumps information about a variable

SYNOPSIS

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

DESCRIPTION

	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.

	All public, private and protected properties of objects will be returned in the output unless the object implements a __debugInfo() method
       (implemented in PHP 5.6.0).

       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

	      o $expression
		- The variable you want to dump.

RETURN VALUES

	No value is returned.

EXAMPLES

       Example #1

	      var_dump(3) example

	      <?php
	      $a = array(1, 2, array("a", "b", "c"));
	      var_dump($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)

SEE ALSO

       print_r(3), debug_zval_dump(3), var_export(3), __debugInfo().

PHP Documentation Group 													       VAR_DUMP(3)

PRINT_R(3)								 1								PRINT_R(3)

print_r - Prints human-readable information about a variable

SYNOPSIS

       mixed print_r (mixed  $expression, [bool  $return = false])

DESCRIPTION

       print_r(3) displays information about a variable in a way that's readable by humans.

       print_r(3),  var_dump(3) and var_export(3) will also show protected and private properties of objects with PHP 5. Static class members will
       not be shown.

PARAMETERS

	      o $expression
		- The expression to be printed.

	      o $return
		- If you would like to capture the output of print_r(3), use the $return parameter. When this parameter is set to TRUE, print_r(3)
		will return the information rather than print it.

RETURN VALUES

	If  given a string, integer or float, the value itself will be printed. If given an array, values will be presented in a format that shows
       keys and elements. Similar notation is used for objects.

	When the $return parameter is TRUE, this function will return a string. Otherwise, the return value is TRUE.

NOTES

       Note

	      When the $return parameter is used, this function uses internal output buffering so it cannot be used inside an ob_start(3) callback
	      function.

EXAMPLES

       Example #1

	      print_r(3) example

	      <pre>
	      <?php
	      $a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x', 'y', 'z'));
	      print_r ($a);
	      ?>
	      </pre>

	      The above example will output:

	      <pre>
	      Array
	      (
		  [a] => apple
		  [b] => banana
		  [c] => Array
		      (
			  [0] => x
			  [1] => y
			  [2] => z
		      )
	      )
	      </pre>

       Example #2

	      $return parameter example

	      <?php
	      $b = array ('m' => 'monkey', 'foo' => 'bar', 'x' => array ('x', 'y', 'z'));
	      $results = print_r($b, true); // $results now contains output from print_r
	      ?>

SEE ALSO

       ob_start(3), var_dump(3), var_export(3).

PHP Documentation Group 														PRINT_R(3)