https://blog.iphpo.com/tags/php/Recent content in php on 戲中話Hugozh-twherb09638@gmail.com (Herb)herb09638@gmail.com (Herb)Sun, 30 Dec 2018 16:19:29 +0800https://blog.iphpo.com/blog/2018-12/%E5%88%A4%E6%96%B7%E5%85%A9%E7%B7%9A%E6%96%B7%E7%9B%B8%E4%BA%A4/Sat, 29 Dec 2018 16:28:29 +0800herb09638@gmail.com (Herb)https://blog.iphpo.com/blog/2018-12/%E5%88%A4%E6%96%B7%E5%85%A9%E7%B7%9A%E6%96%B7%E7%9B%B8%E4%BA%A4/利用向量積判斷 AB 線段與 CD 線段是否相交https://blog.iphpo.com/blog/2018/01/%E6%9C%80%E5%BF%AB%E7%9A%84-hash-function-fastest-hash-xxxhash/Sat, 13 Jan 2018 00:00:00 +0800herb09638@gmail.com (Herb)https://blog.iphpo.com/blog/2018/01/%E6%9C%80%E5%BF%AB%E7%9A%84-hash-function-fastest-hash-xxxhash/<p>今天在找速度最快的 hash function</p> <p>不必考慮安全因素</p> <p>只要速度!!</p> <p>主要用途是給css, js加上 hash name</p>https://blog.iphpo.com/blog/2017/12/php7-2-%E6%96%B0%E7%89%B9%E6%80%A7-%E6%96%B0%E5%8A%9F%E8%83%BD-php72-new-feature/Sun, 31 Dec 2017 00:00:00 +0800herb09638@gmail.com (Herb)https://blog.iphpo.com/blog/2017/12/php7-2-%E6%96%B0%E7%89%B9%E6%80%A7-%E6%96%B0%E5%8A%9F%E8%83%BD-php72-new-feature/<p>PHP 7.2 在 2017年十一月30號釋出了</p> <p>趕緊用 phpbrew 裝在 Mac 上測試玩玩</p> <p>來看看有哪些新功能吧</p>https://blog.iphpo.com/blog/2017/11/%E6%B8%AC%E8%A9%A6-php-%E8%A3%A1%E7%9A%84-serialize-%E5%87%BD%E5%BC%8F%E6%95%88%E8%83%BD/Mon, 13 Nov 2017 00:00:00 +0800herb09638@gmail.com (Herb)https://blog.iphpo.com/blog/2017/11/%E6%B8%AC%E8%A9%A6-php-%E8%A3%A1%E7%9A%84-serialize-%E5%87%BD%E5%BC%8F%E6%95%88%E8%83%BD/<p>這次比較的有最常用的三種方式</p> <p>PHP內建的serialize</p> <p>還有json_encode</p> <p>另一個可能有人不知道</p> <p>叫 igbinary</p> <p>這東西在PHP5時代</p> <p>效能可是海放 PHP 內建的 serialize</p> <p>但是在效能大耀進的PHP 7上呢？</p> <p>馬上來做個實驗看看</p>https://blog.iphpo.com/blog/2017/09/nested-transaction-using-savepoint/Sat, 09 Sep 2017 00:00:00 +0800herb09638@gmail.com (Herb)https://blog.iphpo.com/blog/2017/09/nested-transaction-using-savepoint/<p>這次測試的資料庫是 Oracle 12c</p> <p>但MySQL Postgre SQL應該都有支援savepoint</p> <p>這次測試的code有用到doctrine ORM</p>https://blog.iphpo.com/blog/2017/09/%E8%B3%87%E6%96%99%E5%BA%AB%E7%9A%84-acid/Sat, 09 Sep 2017 00:00:00 +0800herb09638@gmail.com (Herb)https://blog.iphpo.com/blog/2017/09/%E8%B3%87%E6%96%99%E5%BA%AB%E7%9A%84-acid/<p>一直以來都沒把ACID的定義記清楚</p> <p>只知道在程式裡開transaction</p> <p>最後commit或rollback</p> <p>不過這也誤打誤撞的符合ACID要求</p>https://blog.iphpo.com/blog/2017/09/%E5%8F%AF%E5%B0%87id%E7%B7%A8%E7%A2%BC%E7%9A%84%E5%B7%A5%E5%85%B7/Fri, 08 Sep 2017 00:00:00 +0800herb09638@gmail.com (Herb)https://blog.iphpo.com/blog/2017/09/%E5%8F%AF%E5%B0%87id%E7%B7%A8%E7%A2%BC%E7%9A%84%E5%B7%A5%E5%85%B7/<p>其實應用很廣泛</p> <p>也因為可以控制雜湊的長度</p> <p>所以可以做為短網址的應用</p>https://blog.iphpo.com/blog/2017/04/%E5%9C%A8composer%E5%8A%A0%E5%85%A5%E6%9C%AC%E5%9C%B0%E7%AB%AF%E9%96%8B%E7%99%BC%E4%B8%AD%E7%9A%84package-add-local-package-in-composer/Tue, 11 Apr 2017 00:00:00 +0800herb09638@gmail.com (Herb)https://blog.iphpo.com/blog/2017/04/%E5%9C%A8composer%E5%8A%A0%E5%85%A5%E6%9C%AC%E5%9C%B0%E7%AB%AF%E9%96%8B%E7%99%BC%E4%B8%AD%E7%9A%84package-add-local-package-in-composer/<p>在PHP已經進化到7的時代</p> <p>不只速度的提升</p> <p>也代表很多標準被定義出來</p> <p>標準被定義出來也代表著</p> <p>遵循這些定義所產生的Package, Library就會很多</p> <p>用<a href="https://getcomposer.org/">Composer</a>管理套件的相依性就變成無法阻擋的趨勢</p>https://blog.iphpo.com/blog/2017/04/%E5%A6%82%E4%BD%95%E8%87%AA%E8%A3%BDcomposer%E7%9A%84%E5%A5%97%E4%BB%B6-how-to-create-own-composer-package/Tue, 11 Apr 2017 00:00:00 +0800herb09638@gmail.com (Herb)https://blog.iphpo.com/blog/2017/04/%E5%A6%82%E4%BD%95%E8%87%AA%E8%A3%BDcomposer%E7%9A%84%E5%A5%97%E4%BB%B6-how-to-create-own-composer-package/<p>首先一定要有<a href="https://getcomposer.org/">Composer</a></p> <p>建議安裝在可直接執行的地方</p> <p>像我就裝在 /usr/local/bin</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sh" data-lang="sh"><span class="line"><span class="cl">php -r <span class="s2">&#34;copy(&#39;https://getcomposer.org/installer&#39;, &#39;composer-setup.php&#39;);&#34;</span> </span></span><span class="line"><span class="cl">php composer-setup.php --install-dir<span class="o">=</span>/usr/local/bin </span></span><span class="line"><span class="cl">mv /usr/local/bin/composer.phar /usr/local/bin/composer </span></span><span class="line"><span class="cl">chmod +x /usr/local/bin/composer </span></span></code></pre></div><p>然後建立一個專案資料夾</p>https://blog.iphpo.com/blog/2017/04/php-fpm%E5%A6%82%E4%BD%95%E7%94%A2%E7%94%9Fcore-dump%E6%AA%94%E6%A1%88-how-to-generate-core-dump-file-on-nginx/Sat, 08 Apr 2017 00:00:00 +0800herb09638@gmail.com (Herb)https://blog.iphpo.com/blog/2017/04/php-fpm%E5%A6%82%E4%BD%95%E7%94%A2%E7%94%9Fcore-dump%E6%AA%94%E6%A1%88-how-to-generate-core-dump-file-on-nginx/<p>這陣子裝了Jetpack plugin</p> <p>發現一直有 <a href="https://blog.iphpo.com/blog/2017/04/%E6%95%B4%E7%90%86-exited-on-signal-11-sigsegv-%E8%A7%A3%E6%B1%BA%E6%96%B9%E6%B3%95/">EXITED ON SIGNAL 11 (SIGSEGV)</a> 的問題</p> <p>改了一堆設定</p> <p>把buffer加大</p> <p>timeout加大</p> <p>都沒用</p> <p>伺服器上的php是用remi repo安裝的</p> <p>預設沒有開啟debug</p> <p>所以無法產生core dump文件</p> <p>今天心一橫</p> <p>決定自己來compile php</p>https://blog.iphpo.com/blog/2017/04/%E6%95%B4%E7%90%86-exited-on-signal-11-sigsegv-%E8%A7%A3%E6%B1%BA%E6%96%B9%E6%B3%95/Fri, 07 Apr 2017 00:00:00 +0800herb09638@gmail.com (Herb)https://blog.iphpo.com/blog/2017/04/%E6%95%B4%E7%90%86-exited-on-signal-11-sigsegv-%E8%A7%A3%E6%B1%BA%E6%96%B9%E6%B3%95/<p><code> [06-Apr-2017 22:55:02] WARNING: [pool www] child 6785 exited on signal 11 (SIGSEGV) after 7896.992354 seconds from start </code></p> <p> </p> <p>首先這個錯誤是某個php script崩潰</p> <p>不是error也不是遇到什麼錯誤</p> <p>而是執行過程整個process崩潰</p> <p>查了一些資料</p> <p>整理出有幾個原因</p>