关于打开DreamHost——allow_url_fopen 配置。DreamHost 默认不打开文件系统和流配置选项 allow_url_fopen ,而是建议使用一个替代的函数模块 cURL。下面以一个例子说明用 cURL 远程读取的方法:
第一,allow_url_fopen = On 的情况下:
<?php
$str = file_get_contents("http://www.hosteguide.com/");
if ($str !== false) {
// do something with the content
echo $str;
}
?>
第二,allow_url_fopen = Off 的情况下:
<?php
$ch = curl_init("http://www.hosteguide.com/");
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$str = curl_exec($ch);
if ($str !== false) {
// do something with the content
echo $str;
}
curl_close($ch);
?>
但是很多现成的 PHP 采集器是使用依赖于 allow_url_fopen 选项的函数,当初遇到这个问题时,我搜索了一下,大概有2个解决办法,但是都不方便。一个是编译自己的 PHP,该方法是一切从头开始,怎么定义 PHP 都随你,可是费时费力费空间,当初,我还真的尝试了一下,像 Zend Optimizer 等等,也要自己安装,如果,只是为了使用这一个函数,根本没必要这么折腾;另一个方法是上传什么 php-update.sh 脚本文件,也是比较麻烦的。
后来发现,其实只要定制 php.ini 文件,并让系统知道本网站使用定制的 php.ini 即可,先来说说标准的方法,这需要对 lunix 有一点了解,之后再给出一个更容易的方法,标准的方法如下:
1)用 ssh 方式登录到你的网站,找到以你的网站名命名的目录,例如 hosteguide.com,在它下面用 mkdir 命令创建一个子目录 cgi-bin;
2)把默认的 php.cgi 和 php.ini 文件放到 cgi-bin 目录下,可以从 DreamHost 的系统目录中拷贝,以我的网站为例:
cp /dh/cgi-system/php5.cgi hosteguide.com/cgi-bin/php.cgi
cp /etc/php5/cgi/php.ini hosteguide.com/cgi-bin/php.ini
现在的网站是 php5 的,我也是建议使用这个版本。如果,你使用的是 php4,则要从 /dh/cgi-system/php.cgi 和 /etc/php/cgi/php.ini 分别获取 DreamHost 的默认 php.cig 和 php.ini 文件;
3)编辑 php.ini 文件,把 allow_url_fopen = Off 改为 allow_url_fopen = On 并保存;
4)在域名同名的目录下创建(如果已经存在就修改).htaccess 文件,例如 hosteguide.com/.htaccess 文件,在文件中添加
AddHandler php-cgi .php
Action php-cgi /cgi-bin/php.cgi
5)修改文件的访问权限,例如:
chmod 644 hosteguide.com/.htaccess
chmod 755 hosteguide.com/cgi-bin
chmod 750 hosteguide.com/cgi-bin/php.cgi
chmod 644 hosteguide.com/cgi-bin/php.ini
现在你就可以正常使用依赖于 allow_url_fopen 选项的函数,或者 PHP 的采集器.
---------------------------------------------------------------
DreamHost自己编译PHP,支持采集(allow_url_fopen)
DreamHost 自己编译PHP,支持采集(allow_url_fopen)第一种方法:
1. 下载 php_update.sh 。如果是PHP5,下载 php5_update.sh;如果是 PHP4,下载 php4_update。下面以php5举例。同时下载 附件中的 .htaccess 文件
更新一下:点这里下载php5_update.sh和htaccess文件,我打包好了。
2. FTP上传文件 php5_update.sh 和 .htaccess 到相应域名的根目录
3. SSH登录到Dreamhost,具体操作参见教程六:使用Dreamhost的Shell
4. 修改文件属性为可执行,并执行
[coolcode]chmod +x php5_update.sh
./php5_update.sh[/coolcode]
5. 增加定时项,每周执行一次 php5_update.sh
[coolcode]crontab -e[/coolcode]
然后输入内容
[coolcode]@weekly /home/your-user-name/your-domain-name/php5-update.sh[/coolcode]
按Ctrl + O保存后,按Ctrl + X退出
众所周知,DH默认是不支持大部分的采集器,因为DH默认PHP的 allow_url_fopen 选项没有打开,这是DH的一个大缺陷。好在DH可以让用户自己编译PHP,打开这些选项。
编译方法:
1. 下载附件中的文件 installscript.sh,将其中的“your.domain.com”替换为你的真实域名,然后上传到你的域名目录中
2. 用shell登陆系统
3. 修改 installscript.sh 的属性为可执行:执行命令 “chmod +x installscript.sh”
4. 执行installscript.sh: ./installscript
5. 编译成功后,修改 .htaccess,使用刚才编译出的php程序来解析php文件;在 .htaccess 中添加如下内容:
[coolcode]AddHandler phpFive .php
Action phpFive /cgi-bin/php.cgi[/coolcode]
6. 修改 php.ini,该文件在 ~/your_domain_name/etc/php5/ 目录下,打开 allow_url_fileopen 选项
installscript.sh源码:
[coolcode]#!/bin/sh
# Script updated 2006-12-25 by Carl McDade (hiveminds.co.uk) to allow memory limit and freetype
# Save the code to a file as *.sh
# Abort on any errors
set -e
# The domain in which to install the PHP CGI script.
export DOMAIN=”your.domain.com”
# Where do you want all this stuff built? I’d recommend picking a local
# filesystem.
# ***Don’t pick a directory that already exists!*** We clean up after
# ourselves at the end!
SRCDIR=${HOME}/source
# And where should it be installed?
INSTALLDIR=${HOME}/php5
# Set DISTDIR to somewhere persistent, if you plan to muck around with this
# script and run it several times!
DISTDIR=${HOME}/dist
# Pre-download clean up!!!!
rm -fr $SRCDIR $DISTDIR
# Update version information here.
PHP5=”php-5.2.0″
LIBICONV=”libiconv-1.11″
LIBMCRYPT=”libmcrypt-2.5.7″
LIBXML2=”libxml2-2.6.27″
LIBXSLT=”libxslt-1.1.18″
MHASH=”mhash-0.9.7.1″
ZLIB=”zlib-1.2.3″
CURL=”curl-7.14.0″
LIBIDN=”libidn-0.6.8″
CCLIENT=”imap-2004g”
CCLIENT_DIR=”imap-2004g” # Another pest!
FREETYPE=”freetype-2.2.1″
# What PHP features do you want enabled?
PHPFEATURES=”–prefix=${INSTALLDIR} \
–with-config-file-path=${INSTALLDIR}/etc/php5/${DOMAIN} \
–enable-force-cgi-redirect \
–with-xml \
–with-libxml-dir=${INSTALLDIR} \
–with-freetype-dir=${INSTALLDIR} \
–enable-soap \
–with-openssl=/usr \
–with-mhash=${INSTALLDIR} \
–with-mcrypt=${INSTALLDIR} \
–with-zlib-dir=${INSTALLDIR} \
–with-jpeg-dir=/usr \
–with-png-dir=/usr \
–with-gd \
–enable-gd-native-ttf \
–enable-memory-limit
–enable-ftp \
–with-exif \
–enable-sockets \
–enable-wddx \
–with-iconv=${INSTALLDIR} \
–enable-sqlite-utf8 \
–enable-calendar \
–with-curl=${INSTALLDIR} \
–enable-mbstring \
–enable-mbregex \
–with-mysql=/usr \
–with-mysqli \
–without-pear \
–with-gettext \
–with-imap=${INSTALLDIR} \
–with-imap-ssl=/usr”
# —- end of user-editable bits. Hopefully! —-
# Push the install dir’s bin directory into the path
export PATH=${INSTALLDIR}/bin:$PATH
#setup directories
mkdir -p ${SRCDIR}
mkdir -p ${INSTALLDIR}
mkdir -p ${DISTDIR}
cd ${DISTDIR}
# Get all the required packages
wget -c http://us3.php.net/distributions/${PHP5}.tar.gz
wget -c http://mirrors.usc.edu/pub/gnu/libiconv/${LIBICONV}.tar.gz
wget -c http://easynews.dl.sourceforge.net/sourceforge/mcrypt/libmcrypt-2.5.7.tar.gz
wget -c ftp://xmlsoft.org/libxml2/${LIBXML2}.tar.gz
wget -c ftp://xmlsoft.org/libxml2/${LIBXSLT}.tar.gz
wget -c http://superb-west.dl.sourceforge.net/sourceforge/mhash/${MHASH}.tar.gz
wget -c http://www.zlib.net/${ZLIB}.tar.gz
wget -c http://curl.haxx.se/download/${CURL}.tar.gz
wget -c http://kent.dl.sourceforge.net/sourceforge/freetype/${FREETYPE}.tar.gz
wget -c ftp://alpha.gnu.org/pub/gnu/libidn/${LIBIDN}.tar.gz
wget -c ftp://ftp.cac.washington.edu/imap/old/${CCLIENT}.tar.Z
echo ———- Unpacking downloaded archives. This process may take several minutes! ———-
cd ${SRCDIR}
# Unpack them all
echo Extracting ${PHP5}…
tar xzf ${DISTDIR}/${PHP5}.tar.gz
echo Done.
echo Extracting ${LIBICONV}…
tar xzf ${DISTDIR}/${LIBICONV}.tar.gz
echo Done.
echo Extracting ${LIBMCRYPT}…
tar xzf ${DISTDIR}/${LIBMCRYPT}.tar.gz
echo Done.
echo Extracting ${LIBXML2}…
tar xzf ${DISTDIR}/${LIBXML2}.tar.gz
echo Done.
echo Extracting ${LIBXSLT}…
tar xzf ${DISTDIR}/${LIBXSLT}.tar.gz
echo Done.
echo Extracting ${MHASH}…
tar xzf ${DISTDIR}/${MHASH}.tar.gz
echo Done.
echo Extracting ${ZLIB}…
tar xzf ${DISTDIR}/${ZLIB}.tar.gz
echo Done.
echo Extracting ${CURL}…
tar xzf ${DISTDIR}/${CURL}.tar.gz
echo Done.
echo Extracting ${LIBIDN}…
tar xzf ${DISTDIR}/${LIBIDN}.tar.gz
echo Done.
echo Extracting ${CCLIENT}…
uncompress -cd ${DISTDIR}/${CCLIENT}.tar.Z |tar x
echo Done.
echo Extracting ${FREETYPE}…
tar xzf ${DISTDIR}/${FREETYPE}.tar.gz
echo Done.
# Build them in the required order to satisfy dependencies.
#libiconv
cd ${SRCDIR}/${LIBICONV}
./configure –enable-extra-encodings –prefix=${INSTALLDIR}
# make clean
make
make install
#libxml2
cd ${SRCDIR}/${LIBXML2}
./configure –with-iconv=${INSTALLDIR} –prefix=${INSTALLDIR}
# make clean
make
make install
#libxslt
cd ${SRCDIR}/${LIBXSLT}
./configure –prefix=${INSTALLDIR} \
–with-libxml-prefix=${INSTALLDIR} \
–with-libxml-include-prefix=${INSTALLDIR}/include/ \
–with-libxml-libs-prefix=${INSTALLDIR}/lib/
# make clean
make
make install
#zlib
cd ${SRCDIR}/${ZLIB}
./configure –shared –prefix=${INSTALLDIR}
# make clean
make
make install
#libmcrypt
cd ${SRCDIR}/${LIBMCRYPT}
./configure –disable-posix-threads –prefix=${INSTALLDIR}
# make clean
make
make install
#libmcrypt lltdl issue!!
cd ${SRCDIR}/${LIBMCRYPT}/libltdl
./configure –prefix=${INSTALLDIR} –enable-ltdl-install
# make clean
make
make install
#mhash
cd ${SRCDIR}/${MHASH}
./configure –prefix=${INSTALLDIR}
# make clean
make
make install
#freetype
cd ${SRCDIR}/${FREETYPE}
./configure –prefix=${INSTALLDIR}
# make clean
make
make install
#libidn
cd ${SRCDIR}/${LIBIDN}
./configure –with-iconv-prefix=${INSTALLDIR} –prefix=${INSTALLDIR}
# make clean
make
make install
#cURL
cd ${SRCDIR}/${CURL}
./configure –with-ssl=${INSTALLDIR} –with-zlib=${INSTALLDIR} \
–with-libidn=${INSTALLDIR} –enable-ipv6 –enable-cookies \
–enable-crypto-auth –prefix=${INSTALLDIR}
# make clean
make
make install
# c-client
cd ${SRCDIR}/${CCLIENT_DIR}
make ldb
# Install targets are for wusses!
cp c-client/c-client.a ${INSTALLDIR}/lib/libc-client.a
cp c-client/*.h ${INSTALLDIR}/include
#PHP 5
cd ${SRCDIR}/${PHP5}
./configure ${PHPFEATURES}
# make clean
make
make install
#copy config file
mkdir -p ${INSTALLDIR}/etc/php5/${DOMAIN}
cp ${SRCDIR}/${PHP5}/php.ini-dist ${INSTALLDIR}/etc/php5/${DOMAIN}/php.ini
#copy PHP CGI
mkdir -p ${HOME}/${DOMAIN}/cgi-bin
chmod 0755 ${HOME}/${DOMAIN}/cgi-bin
cp ${INSTALLDIR}/bin/php ${HOME}/${DOMAIN}/cgi-bin/php.cgi
rm -fr $SRCDIR $DISTDIR
echo ———- INSTALL COMPLETE! ———-[/coolcode]
参考文档:http://wiki.dreamhost.com/index.php/Installing_PHP5
FROM http://dupola.com/post/108
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