More and more scripts are requiring the use of curl within PHP. As curl is already available on Mac OS X adding it to the PHP build becomes very simple. Almost to simple to mention here but here it is:
Recompile the php installation as described on this page: Compiling PHP.
The only change you need to make is to add:
To the configure statement and it will include this library for you.
./configure --prefix=/usr/local/php5 \ --mandir=/usr/share/man \ --infodir=/usr/share/info \ --sysconfdir=/etc \ --with-config-file-path=/etc \ --with-zlib \ --with-zlib-dir=/usr \ --with-openssl \ --without-iconv \ --enable-exif \ --enable-ftp \ --enable-mbstring \ --enable-mbregex \ --enable-sockets \ --with-mysql=mysqlnd \ --with-pdo-mysql=mysqlnd \ --with-mysqli=mysqlnd \ --with-curl \ --with-apxs2=/usr/local/apache2/bin/apxs