PHP.ini

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Below are instructions for using your own modified version of php.ini. DreamHost technical support does not recommend, and will provide no support for, this method. Follow these instructions at your own risk. The preferred method is to compile and install your own version of PHP, although that is also an unsupported approach. Please refer to Installing_PHP4 or Installing_PHP5 for instructions.

The instructions provided in this article or section are considered advanced.

You are expected to be knowledgeable in the UNIX shell.

Support for these instructions is not available from DreamHost tech support.


Contents

[edit] Procedure for allowing php.ini configuration for a website (shows changing file upload max)

[edit] Create a cgi-bin Directory

First you’ll need a cgi-bin directory: 

mkdir ~/[your website directory]/cgi-bin/

This directory will be hosting your copy of php and your php.ini file.

[edit] Create a script to retrieve the latest copy of php.cgi and php.ini

Make a file in ~/ called php-copy.sh containing the following, where 100M contains whatever file size limit you like, and [your website directory] is appropriately substituted.

For PHP4: 

#!/bin/sh
CGIFILE="$HOME/[your website directory]/cgi-bin/php.cgi"
INIFILE="$HOME/[your website directory]/cgi-bin/php.ini"
rsync -a /dh/cgi-system/php.cgi "$CGIFILE"
# REMOVE THE FOLLOWING LINE TO CREATE THE UPDATE-ONLY SCRIPT:
cp /etc/php/cgi/php.ini "$INIFILE"

perl -p -i -e '
s/.*post_max_size.*/post_max_size = 100M/;
s/.*upload_max_filesize.*/upload_max_filesize = 100M/;
' "$INIFILE"

For PHP5: 

#!/bin/sh
CGIFILE="$HOME/[your website directory]/cgi-bin/php.cgi"
INIFILE="$HOME/[your website directory]/cgi-bin/php.ini"
rsync -a /dh/cgi-system/php5.cgi "$CGIFILE"
# REMOVE THE FOLLOWING LINE TO CREATE THE UPDATE-ONLY SCRIPT:
cp /etc/php5/cgi/php.ini "$INIFILE"

perl -p -i -e '
s/.*post_max_size.*/post_max_size = 100M/;
s/.*upload_max_filesize.*/upload_max_filesize = 100M/;
' "$INIFILE"

More general script with options: 

#!/bin/sh

test $# = 0 && exit 1
while test "$1";do
  case $1 in
    -php5) PHP=php5 ;; 
    -sm) shift; SM=$1 ;;
    -rg) shift; RG=$1 ;;
    -pms) shift; PMS=$1 ;;
    -umfs) shift; UMFS=$1 ;;
    -mqg) shift; MQG=$1 ;;
    -met) shift; MET=$1 ;;
    -mit) shift; MIT=$1 ;;
    -ml) shift; ML=$1 ;;
    *) D=$1 ;;
  esac
  shift
done
test "$D" || exit 1
test -d "$HOME/$D" || exit 1
CGI="$HOME/$D/cgi-bin"
mkdir -m0755 -p $CGI || exit 2

PHP=${PHP:-php}
SM=${SM:-On}
RG=${RG:-Off}
PMS=${PMS:-8M}
UMFS=${UMFS:-7M}
MQG=${MQG:-Off}
MET=${MET:-30}
MIT=${MET:-60}
ML=${ML:-8M}

CGIFILE="$CGI/$PHP.cgi"
INIFILE="$CGI/php.ini"

echo "CGI=$CGI MQG=${MQG} UMFS=${UMFS} PMS=${PMS} RG=${RG} SM=${SM} MET=${MET} MIT=${MIT} ML=${ML}" >&2

rsync -au /dh/cgi-system/$PHP.cgi "$CGIFILE"
# REMOVE THE FOLLOWING LINE TO CREATE THE UPDATE-ONLY SCRIPT:
[ -s /etc/$PHP/cgi/php.ini ] && \
  sed -e "s/^safe_mode[ ]*=.*/safe_mode = $SM/" \
  -e "s/register_globals[ ]*=.*/register_globals = $RG/" \
  -e "s/magic_quotes_gpc[ ]*=.*/magic_quotes_gpc = $MQG/" \
  -e "s/.*post_max_size.*/post_max_size = $PMS/" \
  -e "s/.*upload_max_filesize.*/upload_max_filesize = $UMFS/" \
  -e "s/.*max_execution_time.*/max_execution_time = $MET/" \
  -e "s/.*max_input_time.*/max_input_time = $MIT/" \
  -e "s/.*memory_limit.*/memory_limit= $ML/" \
  /etc/$PHP/cgi/php.ini > "$INIFILE"

chmod 0755 "$CGIFILE"
chmod 0644 "$INIFILE"
[ -s $CGI/.htaccess ] || echo "Options -Indexes" > $CGI/.htaccess
touch $HOME/$D/.htaccess
if grep -q '^Options' $HOME/$D/.htaccess; then
  grep -q '+ExecCGI' $HOME/$D/.htaccess || \
    sed -i 's/^Options\(.*\)/Options\1 +ExecCGI/' $HOME/$D/.htaccess
else
  echo "Options +ExecCGI" >> $HOME/$D/.htaccess
fi
grep -q '^AddHandler[ ]\+php-cgi[ ]\+.php' $HOME/$D/.htaccess ||
  echo "AddHandler php-cgi .php" >> $HOME/$D/.htaccess
if grep -q '^Action[ ]\+php-cgi' $HOME/$D/.htaccess; then
  sed -i "s@^Action[ ]\+php-cgi.*@Action php-cgi /cgi-bin/$PHP.cgi@" \
    $HOME/$D/.htaccess
else
  echo "Action php-cgi /cgi-bin/$PHP.cgi"  >> $HOME/$D/.htaccess
fi

[edit] Prepare script for execution

Execute the following commands into the shell:

The following command will give you permission to execute the php-copy.sh that we just created. 

chmod +x php-copy.sh

The following command calls our new shell script to copy the php.cgi and php.ini files into our cgi-bin directory. 

./php-copy.sh

If you get the error message: "bad interpreter: No such file or directory", there is probably an unseen problem with the formatting of the file, and you should run the following command to convert it to proper Unix format before calling the script again: 

dos2unix php-copy.sh

[edit] Configure your website to use new the php.ini that we just set up

Create the file ~/[your website directory]/.htaccess which contains the lines: 

Options +ExecCGI
AddHandler php-cgi .php
Action php-cgi /cgi-bin/php.cgi

This is telling Apache (the webserver) to use the php.cgi and php.ini that php-copy.sh (or subsequently, php-update.sh) copied into ~/[your website directory]/cgi-bin.


[edit] Protect your new php.ini and php cgi

In the file ~/[your website directory]/cgi-bin/.htaccess add 

<FilesMatch "^php5?\.(ini|cgi)$">
Order Deny,Allow
Deny from All
Allow from env=REDIRECT_STATUS
</FilesMatch>

[edit] Test your new PHP setup

Open one of your existing PHP pages in your browser to ensure that your newly-installed local copy of PHP is functioning properly. If there is a problem, go back over the prior steps and use your debugging skills and your mastery of PHP, shell scripts and Linux to get your newly-copied PHP interpreter working! Once everything works properly, go on to the next step.

[edit] Create a shell script to make a fresh copy of php (for future use) 

cp php-copy.sh php-update.sh

Open the newly-created php-update.sh script in your favorite text editor and find this line: 

# REMOVE THE FOLLOWING LINE TO CREATE THE UPDATE-ONLY SCRIPT:

Delete that line as well as the line following it. Then save php-update.sh

If you got a "bad interpreter: No such file or directory" error message when you executed ./php-copy.sh previously, remember to convert the new file to unix format by running the following command: dos2unix php-update.sh. You might also want to run this script on your .htaccess file if you're encountering Internal Server Error 500 to clean up the line breaks.

[edit] Set up a cron task to keep php up to date

Type: 

crontab -e

And then enter the following in the text editor that shows up (replacing 'myusername' with your specific username): 

@weekly /home/myusername/php-update.sh

This will update the php binary and config file once a week.

[edit] See also

[edit] External links

PHP: php.ini directives - Manual - (from php.net)

PHP: Runtime Configuration - Manual (from php.net)

PHP: How to change configuration settings - Manual - (from php.net)

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