Good practices to be known for php| development

<span id="Label3"></p>filtering, validating, Escaping<p><p>All these external resources are not fully trusted.</p></p> <ul> <ul> <li><p>$_get</p></li> <li><p>$_post</p></li> <li><p>$_request</p></li> <li><p>$_cookie</p></li> <li><p>$argv</p></li> <li><p>Php://stdin</p></li> <li><p>Php://input</p></li> <li><p>File_get_contents ()</p></li> <li><p>Remote Database</p></li> <li><p>Remote API</p></li> <li><p>Client-side data</p></li> </ul> </ul>Filter<p><p>Use <code>htmlentities()</code> filter HTML to convert special characters to HTML entities, escape output, and use the second parameter <code>ENT_QUOTES</code> .</p></p><p><p>Use <code>PDO预处理语句</code> filtered SQL Injection.</p></p><p><p>Use <code>filter_var()</code> <code>filter_input()</code> the & function to filter and validate different types of Input.</p></p> <blockquote> <blockquote> <p>eg:email, number, char, Special character</p> </blockquote> </blockquote>Password<p><p>The most secure hashing algorithm:<code>bcrypt</code></p></p><p><p>Use:</p></p><pre class="hljs bash"><pre class="hljs bash"><code>password_<span class="hljs-built_in">hash()password_get_info()password_needs_<span class="hljs-built_in">rehash()password_verify()</span></span></code></pre></pre><p><p>function to generate a Password.</p></p>date, time, TimeZone<p><p>Use the <code>DateTime</code> & & classes introduced by PHP5.2.0 <code>DateInterval</code> <code>DateTimeZone</code> to process Time.</p></p>Set the default time zone<p><p>In php.ini, set the</p></p><pre class="hljs coffeescript"><pre class="hljs coffeescript"><code><span class="hljs-string">‘country/city‘</span></code></pre></pre><p><p>Use the <code>date_default_timezone_set()</code> function to set the default time Zone.</p></p>DateTime Class<p><p>Use datetime classes to manage dates and times</p></p><pre class="hljs php"><pre class="hljs php"><code><span class="hljs-variable">$datetime = <span class="hljs-keyword">new DateTime();</span></span></code></pre></pre><p><p>Use <code>DateInterval</code> classes to construct fixed-length time PERIODS. Used in conjunction with methods in the previous class.</p></p>Datetimezone Class<p><p>The processing options for the time Zone.</p></p><pre class="hljs php"><pre class="hljs php"><code><span class="hljs-variable">$timezone = <span class="hljs-keyword">new DateTimeZone(<span class="hljs-string">‘Asia/Shanghai‘);<span class="hljs-variable">$datetime = <span class="hljs-keyword">new DateTime(<span class="hljs-string">‘2016-05-20‘, <span class="hljs-variable">$timezone);<span class="hljs-variable">$datetime->setTimezone(<span class="hljs-keyword">new DateTimeZone(<span class="hljs-string">‘Asia/Hong_Kong‘));</span></span></span></span></span></span></span></span></span></span></code></pre></pre>