var_export(3) [php man page]

VAR_EXPORT(3)								 1							     VAR_EXPORT(3)

var_export - Outputs or returns a parsable string representation of a variable

SYNOPSIS

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

DESCRIPTION

       var_export(3) gets structured information about the given variable. It is similar to var_dump(3) with one exception: the returned represen-
       tation is valid PHP code.

PARAMETERS

	      o $expression
		- The variable you want to export.

	      o $return
		- If used and set to TRUE, var_export(3) will return the variable representation instead of outputting it.

RETURN VALUES

	Returns the variable representation when the $return parameter is used and evaluates to TRUE. Otherwise, this function will return NULL.

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.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.1.0	|						    |
       |	|						    |
       |	|  Possibility	to  export  classes and arrays con- |
       |	| taining classes  using  the  __set_state()  magic |
       |	| method.					    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      var_export(3) Examples

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

	      The above example will output:

	      array (
		0 => 1,
		1 => 2,
		2 =>
		array (
		  0 => 'a',
		  1 => 'b',
		  2 => 'c',
		),
	      )

	      <?php

	      $b = 3.1;
	      $v = var_export($b, true);
	      echo $v;

	      ?>

	      The above example will output:

	      3.1

       Example #2

	      Exporting classes since PHP 5.1.0

	      <?php
	      class A { public $var; }
	      $a = new A;
	      $a->var = 5;
	      var_export($a);
	      ?>

	      The above example will output:

	      A::__set_state(array(
		 'var' => 5,
	      ))

       Example #3

	      Using __set_state() (since PHP 5.1.0)

	      <?php
	      class A
	      {
		  public $var1;
		  public $var2;

		  public static function __set_state($an_array)
		  {
		      $obj = new A;
		      $obj->var1 = $an_array['var1'];
		      $obj->var2 = $an_array['var2'];
		      return $obj;
		  }
	      }

	      $a = new A;
	      $a->var1 = 5;
	      $a->var2 = 'foo';

	      eval('$b = ' . var_export($a, true) . ';'); // $b = A::__set_state(array(
							  //	'var1' => 5,
							  //	'var2' => 'foo',
							  // ));
	      var_dump($b);
	      ?>

	      The above example will output:

	      object(A)#2 (2) {
		["var1"]=>
		int(5)
		["var2"]=>
		string(3) "foo"
	      }

NOTES

       Note

	       Variables of type resource couldn't be exported by this function.

       Note

	      var_export(3)  does not handle circular references as it would be close to impossible to generate parsable PHP code for that. If you
	      want to do something with the full representation of an array or object, use serialize(3).

       Warning

	       When var_export(3) exports objects, the leading backslash is not included in the class name of namespaced classes for maximum  com-
	      patibility.

SEE ALSO

       print_r(3), serialize(3), var_dump(3).

PHP Documentation Group 													     VAR_EXPORT(3)

Check Out this Related Man Page

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)

Linux and UNIX Man Pages

var_export(3) [php man page]

Check Out this Related Man Page