print_r
Prints human-readable information about a variable
&reftitle.description;
mixedprint_r
mixedexpression
boolreturn&false;
print_r displays information about a variable
in a way that's readable by humans.
print_r, var_dump and
var_export will
also show protected and private properties of objects.
Static class members will not be shown.
&reftitle.parameters;
expression
The expression to be printed.
return
If you would like to capture the output of print_r,
use the return parameter. When this parameter is set
to &true;, print_r will return the information rather than print it.
&reftitle.returnvalues;
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;.
&reftitle.notes;
¬e.uses-ob;
&reftitle.examples;
<function>print_r</function> example
'apple', 'b' => 'banana', 'c' => array ('x', 'y', 'z'));
print_r ($a);
?>
]]>
&example.outputs;
Array
(
[a] => apple
[b] => banana
[c] => Array
(
[0] => x
[1] => y
[2] => z
)
)
]]>
<parameter>return</parameter> parameter example
'monkey', 'foo' => 'bar', 'x' => array ('x', 'y', 'z'));
$results = print_r($b, true); // $results now contains output from print_r
?>
]]>
&reftitle.seealso;
ob_start
var_dump
var_export