PHP use different curl version than is installed in system

I am using CentOS distribution and I need to install newer version then 7.15.5. I couldn't upgrade to开发者_Go百科 nower using yum, so I download sources, compile and install without problem.

[root ~]# curl -V
curl 7.21.1 (i686-pc-linux-gnu) libcurl/7.21.1 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Protocols: dict file ftp ftps http https imap imaps ldap ldaps pop3 pop3s rtsp smtp smtps telnet tftp 
Features: IDN Largefile NTLM SSL libz 

However, when I display phpinfo() I see:

cURL support    enabled
cURL Information    libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5

I restarted apache, tried even replacing old curl in /usr/bin/curl with symlink to newer version in /usr/local/bin/curl. Still no clue how to upgrade curl used by PHP.

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When you say you downloaded sources, do you mean you built php sources or curl from source? You need to compile php with with-curl=/usr/local/bin/curl option set to the version of libcurl you want to integrate.