1、下载php源码php-7.0.11# wget http://cn2.php.net/distributions/php-7.0.11.tar.bz2

2、安装php-devel# yum install php-devel  -y

3、编译安装php# cd php-7.0.11/

# ./configure --prefix=/usr/local/php-7.0.11 --disable-debug --enable-shmop --with-gd --with-jpeg-dir=/usr/lib64 --with-png-dir=/usr/lib64 --with-libxml-dir=/usr/lib64 --with-zlib-dir=/usr/lib64 --with-mysqli=mysqlnd --with-mysql=mysqlnd --with-pdo-mysql=mysqlnd --enable-sockets --with-iconv--enable-mbstring --enable-mbregex --enable-ftp --enable-gd-native-ttf --enable-fpm --enable-pcntl --enable-sysvmsg --enable-sysvsem --enable-sysvshm --enable-zip --with-freetype-dir

# make

# make install

4、编译安装curl

4.1 下载c-ares# wget https://c-ares.haxx.se/download/c-ares-1.10.0.tar.gz

4.2 编译安装# tar xf c-ares-1.10.0.tar.gz

# cd  c-ares-1.10.0

# ./configure --prefix=/usr/local/ c-ares-1.10.0

# make

# make install

4.3 下载编curl# wget https://curl.haxx.se/download/curl-7.44.0.tar.bz2

4.4 编译安装curl启用异步支持c-ares# tar xf curl-7.44.0.tar.bz2

# cd curl-7.44.0

# ./configure --prefix=/usr/local/curl-7.44.0

# make

# make install

# cat  vim /etc/ld.so.conf.d/curl.conf

/usr/local/curl-7.44.0/lib/

#ldconfig

5、制作php的curl扩展# cd  php-7.0.11/ext/curl

# /usr/local/php-7.0.11/bin/phpize

#  ./configure  --with-php-config=/usr/local/php-7.0.11/bin/php-config  --with-curl=/usr/local/curl-7.44.0/

# make

# make install

# ls  /usr/local/php-7.0.11/lib/php/extensions/no-debug-non-zts-20151012/

curl.so

6、查看AsynchDNS 是否启用# /usr/local/php-7.0.11/bin/php -i /etc/php.ini  | grep -A 20 curl

curl

cURL support => enabled

cURL Information => 7.44.0

Age => 3

Features

AsynchDNS => Yes

CharConv => No

Debug => No

GSS-Negotiate => No

IDN => Yes

IPv6 => Yes

krb4 => No

Largefile => Yes

libz => Yes

NTLM => Yes

NTLMWB => Yes

SPNEGO => No

SSL => Yes

SSPI => No

TLS-SRP => No

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原文：http://maxingkong.blog.51cto.com/6184921/1956103