Sophie: php-manual-en-4.3.0-2mdk noarch

php-manual-en-4.3.0-2mdk.noarch.rpm

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><H1
><A
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>print_r</H1
><DIV
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><A
NAME="AEN94316"
></A
><P
>    (PHP 4 )</P
>print_r&nbsp;--&nbsp;
     Prints human-readable information about a variable
    </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN94319"
></A
><H2
>Description</H2
>bool <B
CLASS="methodname"
>print_r</B
> ( mixed expression)<BR
></BR
><P
>&#13;     <B
CLASS="function"
>print_r()</B
> displays information about a variable
     in a way that's readable by humans.  If given a <A
HREF="language.types.string.html"
><B
CLASS="type"
>string</B
></A
>,
     <A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
> or <A
HREF="language.types.float.html"
><B
CLASS="type"
>float</B
></A
>, the value itself will be
     printed.  If given an <A
HREF="language.types.array.html"
><B
CLASS="type"
>array</B
></A
>,
     values will be presented in a format that shows keys and
     elements.  Similar notation is used for <A
HREF="language.types.object.html"
><B
CLASS="type"
>object</B
></A
>s.
    </P
><P
>&#13;     Remember that <B
CLASS="function"
>print_r()</B
> will move the array
     pointer to the end. Use <A
HREF="function.reset.html"
><B
CLASS="function"
>reset()</B
></A
> to bring
     it back to beginning.
    </P
><DIV
CLASS="tip"
><BLOCKQUOTE
CLASS="tip"
><P
><B
>Tip: </B
>As with anything that outputs
its result directly to the browser, you can use the <A
HREF="ref.outcontrol.html"
>output-control functions</A
> to capture
the output of this function, and save it in a
<A
HREF="language.types.string.html"
><B
CLASS="type"
>string</B
></A
> (for example).</P
></BLOCKQUOTE
></DIV
><P
>&#13;     <DIV
CLASS="informalexample"
><A
NAME="AEN94342"
></A
><P
></P
><TABLE
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><TR
><TD
><PRE
CLASS="php"
>&#60;pre&#62;
&#60;?php
    $a = array ('a' =&#62; 'apple', 'b' =&#62; 'banana', 'c' =&#62; array ('x','y','z'));
    print_r ($a);
?&#62;
&#60;/pre&#62;</PRE
></TD
></TR
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><P
></P
></DIV
>
    </P
><P
>&#13;     Which will output:
     <TABLE
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><TR
><TD
><PRE
CLASS="screen"
>&#60;pre&#62;
Array
(
    [a] =&#62; apple
    [b] =&#62; banana
    [c] =&#62; Array
        (
            [0] =&#62; x
            [1] =&#62; y
            [2] =&#62; z
        )
)
&#60;/pre&#62;</PRE
></TD
></TR
></TABLE
>
     </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>
      Prior to PHP 4.0.4, <B
CLASS="function"
>print_r()</B
> will continue forever
      if given an <A
HREF="language.types.array.html"
><B
CLASS="type"
>array</B
></A
> or <A
HREF="language.types.object.html"
><B
CLASS="type"
>object</B
></A
> that
      contains a direct or indirect reference to itself.  An example
      is <TT
CLASS="literal"
>print_r($GLOBALS)</TT
> because
      <TT
CLASS="literal"
>$GLOBALS</TT
> is itself a global variable that
      contains a reference to itself.
     </P
></BLOCKQUOTE
></DIV
><P
>&#13;      See also <A
HREF="function.ob-start.html"
><B
CLASS="function"
>ob_start()</B
></A
>, <A
HREF="function.var-dump.html"
><B
CLASS="function"
>var_dump()</B
></A
>,
      and <A
HREF="function.var-export.html"
><B
CLASS="function"
>var_export()</B
></A
>.
    </P
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