How does one install imagick extensions in PHP?

Phpinfo has successfully loaded the imagick extension, but I use get_extension_funcs (& #039; imagick & #039;); but there is no way. I followed the following steps: first, use yum to install {code ...} install the ImageMagick-6.5.4 successfully and then install the php extension {code ...} above press... phpinfo has successfully loaded the imagick extension, but I use get_extension_funcs('imagick');But there is no way.
As follows:
First, use yum to install

yum install -y ImageMagick ImageMagick-devel

Successfully installed ImageMagick-6.5.4
Then install php Extension

phpize ./configure --with-php-config=/usr/local/php5.5/bin/php-config --with-imagick=/usr/make && make install

All of the above is successful, but this method is not available when I use the imagick extension.
Last useget_extension_funcs('imagick');Function to view the method in this extension, but found nothing?

Why?
Environment
Centos 6.5 + nginx1.4.7+php5.5

Reply content:

Phpinfo has successfully loaded the imagick extension, but I useget_extension_funcs('imagick');But there is no way.
As follows:
First, use yum to install

yum install -y ImageMagick ImageMagick-devel

Successfully installed ImageMagick-6.5.4
Then install php Extension

phpize ./configure --with-php-config=/usr/local/php5.5/bin/php-config --with-imagick=/usr/make && make install

All of the above is successful, but this method is not available when I use the imagick extension.
Last useget_extension_funcs('imagick');Function to view the method in this extension, but found nothing?

Why?
Environment
Centos 6.5 + nginx1.4.7+php5.5

You may need to runphp -i |grep 'extension_dir'Check whether the so file is successfully compiled in the corresponding directory.
Then runphp -i |grep 'ini'Locate the ini configuration file and add it.

[Imagick] extension = so file name