how to install Memcached and APC?

[aspi]

THX everyone. Just for fresh Zend OPcache installation on VestaCP/CentOS 6.7 64Bit I've used next steps:

short way from CenOS

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php -v
return version 5.4

yum install  --enablerepo=remi php-pecl-zendopcache -y
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php -v
return version 5.4

yum install  php-pecl-zendopcache -y

note: don't use apc and zendOpCache at the same time

next at the bottom of the /etc/php.ini I've added this lines:

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[opcache]
; Determines if Zend OPCache is enabled
opcache.enable=1

; Determines if Zend OPCache is enabled for the CLI version of PHP
opcache.enable_cli=1

; The OPcache shared memory storage size.
opcache.memory_consumption=128

; The amount of memory for interned strings in Mbytes.
opcache.interned_strings_buffer=8

; The maximum number of keys (scripts) in the OPcache hash table.
; Only numbers between 200 and 100000 are allowed.
opcache.max_accelerated_files=4000

restart phpd by

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service httpd restart

and then it could be checked by:

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php -i

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Zend OPcache

Opcode Caching => Up and Running
Optimization => Enabled
Startup => OK
Shared memory model => mmap
Cache hits => 0
Cache misses => 0
Used memory => 10935072
Free memory => 123282656
Wasted memory => 0
Interned Strings Used memory => 496400
Interned Strings Free memory => 7892208
Cached scripts => 0
Cached keys => 0
Max keys => 7963
OOM restarts => 0
Hash keys restarts => 0
Manual restarts => 0