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

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>How to change configuration settings</TITLE
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>Chapter 4. Configuration</TD
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><DIV
CLASS="sect1"
><H1
CLASS="sect1"
><A
NAME="configuration.changes"
></A
>How to change configuration settings</H1
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="configuration.changes.apache"
></A
>Running <TT
CLASS="literal"
>PHP</TT
> as Apache module</H2
><P
>&#13;     When using PHP as an Apache module, you can also change the
     configuration settings using directives in Apache configuration
     files (e.g. <TT
CLASS="filename"
>httpd.conf</TT
>) and
     <TT
CLASS="filename"
>.htaccess</TT
> files (You will need
     "AllowOverride Options" or "AllowOverride All" privileges)
    </P
><P
>&#13;     With PHP 4.0, there are several Apache directives that allow you
     to change the PHP configuration from within the Apache configuration
     files.  For a listing of which directives are 
     <TT
CLASS="constant"
><B
>PHP_INI_ALL</B
></TT
>, <TT
CLASS="constant"
><B
>PHP_INI_PERDIR</B
></TT
>, 
     or <TT
CLASS="constant"
><B
>PHP_INI_SYSTEM</B
></TT
>, have a look at the table
     found within the <A
HREF="function.ini-set.html"
><B
CLASS="function"
>ini_set()</B
></A
> documentation.
    </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>
      With PHP 3.0, there are Apache directives that correspond to each
      configuration setting in the <TT
CLASS="filename"
>php3.ini</TT
> name,
      except the name is prefixed by "php3_".
     </P
></BLOCKQUOTE
></DIV
><P
>&#13;     <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><SPAN
CLASS="systemitem"
>php_value</SPAN
>
        <TT
CLASS="parameter"
><I
>name</I
></TT
>
        <TT
CLASS="parameter"
><I
>value</I
></TT
></DT
><DD
><P
>&#13;         Sets the value of the specified directive.
         Can be used only with PHP_INI_ALL and PHP_INI_PERDIR type directives.
         To clear a previously set value use <TT
CLASS="literal"
>none</TT
>
         as the value.
         <DIV
CLASS="informalexample"
><A
NAME="AEN2152"
></A
><P
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="ini"
>php_value auto_prepend_file none</PRE
></TD
></TR
></TABLE
><P
></P
></DIV
>
        </P
></DD
><DT
><SPAN
CLASS="systemitem"
>php_flag</SPAN
>
        <TT
CLASS="parameter"
><I
>name</I
></TT
>
        <TT
CLASS="parameter"
><I
>on|off</I
></TT
></DT
><DD
><P
>&#13;         Used to set a Boolean configuration directive.
         Can be used only with PHP_INI_ALL and PHP_INI_PERDIR type directives.
        </P
></DD
><DT
><SPAN
CLASS="systemitem"
>php_admin_value</SPAN
>
        <TT
CLASS="parameter"
><I
>name</I
></TT
>
        <TT
CLASS="parameter"
><I
>value</I
></TT
></DT
><DD
><P
>&#13;         Sets the value of the specified directive.
         This can NOT be used in <TT
CLASS="filename"
>.htaccess</TT
> files.
         Any directive type set with <SPAN
CLASS="systemitem"
>php_admin_value</SPAN
>
         can not be overridden by <TT
CLASS="filename"
>.htaccess</TT
> or virtualhost directives.
        </P
></DD
><DT
><SPAN
CLASS="systemitem"
>php_admin_flag</SPAN
>
        <TT
CLASS="parameter"
><I
>name</I
></TT
>
        <TT
CLASS="parameter"
><I
>on|off</I
></TT
></DT
><DD
><P
>&#13;         Used to set a Boolean configuration directive.
         This can NOT be used in <TT
CLASS="filename"
>.htaccess</TT
> files.
         Any directive type set with <SPAN
CLASS="systemitem"
>php_admin_flag</SPAN
>
         can not be overridden by <TT
CLASS="filename"
>.htaccess</TT
> or virtualhost directives.
        </P
></DD
></DL
></DIV
>
    </P
><P
>&#13;     <TABLE
WIDTH="100%"
BORDER="0"
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN2182"
></A
><P
><B
>Example 4-2. Apache configuration example</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="ini"
>&#60;IfModule mod_php4.c&#62;
  php_value include_path ".:/usr/local/lib/php"
  php_admin_flag safe_mode on
&#60;/IfModule&#62;
&#60;IfModule mod_php3.c&#62;
  php3_include_path ".:/usr/local/lib/php"
  php3_safe_mode on
&#60;/IfModule&#62;</PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
    
     <DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>
       PHP constants do not exist outside of PHP. For example, in 
       <TT
CLASS="filename"
>httpd.conf</TT
> you can not use PHP constants 
       such as <TT
CLASS="constant"
><B
>E_ALL</B
></TT
> or <TT
CLASS="constant"
><B
>E_NOTICE</B
></TT
> 
       to set the <A
HREF="ref.errorfunc.html#ini.error-reporting"
>error_reporting</A
> 
       directive as they will have no meaning and will evaluate to
       <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>0</I
></SPAN
>. Use the associated bitmask values instead.
       These constants can be used in <TT
CLASS="filename"
>php.ini</TT
>
      </P
></BLOCKQUOTE
></DIV
>
    </P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="configuration.changes.other"
></A
>Other interfaces to <TT
CLASS="literal"
>PHP</TT
></H2
><P
>&#13;     Regardless of the interface to <TT
CLASS="literal"
>PHP</TT
> you can change
     certain values at runtime of your scripts through
     <A
HREF="function.ini-set.html"
><B
CLASS="function"
>ini_set()</B
></A
>. The following table provides an overview
     at which level a directive can be set/changed.
    </P
><P
>&#13;     <DIV
CLASS="table"
><A
NAME="AEN2200"
></A
><P
><B
>Table 4-1. Definition of PHP_INI_* constants</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><THEAD
><TR
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Constant</TH
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Value</TH
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Meaning</TH
></TR
></THEAD
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>PHP_INI_USER</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>1</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>Entry can be set in user scripts</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>PHP_INI_PERDIR</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>2</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>&#13;         Entry can be set in <TT
CLASS="filename"
>php.ini</TT
>, <TT
CLASS="filename"
>.htaccess</TT
> or
         <TT
CLASS="filename"
>httpd.conf</TT
>
        </TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>PHP_INI_SYSTEM</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>4</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>&#13;         Entry can be set in <TT
CLASS="filename"
>php.ini</TT
> or <TT
CLASS="filename"
>httpd.conf</TT
>
        </TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>PHP_INI_ALL</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>7</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>Entry can be set anywhere</TD
></TR
></TBODY
></TABLE
></DIV
>
    </P
><P
>&#13;     You can view the settings of the configuration values in
     the output of <A
HREF="function.phpinfo.html"
><B
CLASS="function"
>phpinfo()</B
></A
>. You can also
     access the values of individual configuration directives using
     <A
HREF="function.ini-get.html"
><B
CLASS="function"
>ini_get()</B
></A
> or <A
HREF="function.get-cfg-var.html"
><B
CLASS="function"
>get_cfg_var()</B
></A
>.
    </P
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