<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Requirements</title>
</head>
<body><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="openssl.setup.html">Installing/Configuring</a></div>
<div class="next" style="text-align: right; float: right;"><a href="openssl.installation.html">Installation</a></div>
<div class="up"><a href="openssl.setup.html">Installing/Configuring</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="openssl.requirements" class="section">
<h2 class="title">Requirements</h2>
<p class="para">
In order to use the OpenSSL functions you need to install the <a href="http://www.openssl.org/" class="link external">» OpenSSL</a> library.
PHP 5 requires at least OpenSSL >= 0.9.6. However later PHP 5 versions
have some compilation issues and should be used at least with OpenSSL >=
0.9.8 which is also a minimal version for PHP 7.0. Other versions
(PHP >= 7.1.0) require OpenSSL >= 1.0.1.
</p>
<div class="warning"><strong class="warning">Warning</strong>
<p class="para">
You are strongly encouraged to use the most recent OpenSSL version,
otherwise your web server could be vulnerable to attack.
</p>
</div>
</div><hr /><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="openssl.setup.html">Installing/Configuring</a></div>
<div class="next" style="text-align: right; float: right;"><a href="openssl.installation.html">Installation</a></div>
<div class="up"><a href="openssl.setup.html">Installing/Configuring</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
