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href="/atom.xml" class="dropdown-menu button">RSS</a></div></div></header><cover></cover><main><div class="post-content"><div class="post-title"><h1 class="post-title__text">PHP踩坑记录#1</h1><div class="post-title__meta"><a href="/archives/2019/02/" class="post-meta__date button">2019-02-18</a> <span class="separate-dot"></span> <a href="/categories/%E6%8A%80%E6%9C%AF%E5%90%91/" class="button"><span class="post-meta__cats">技术向</span></a><style>.post-meta__pv{color:var(--t-l);visibility:hidden;opacity:0;transition:.2s}</style><span class="separate-dot"></span> <span class="post-meta__pv"></span></div></div><aside class="post-side"><div class="post-side__toc"><div class="toc-title">文章目录</div><ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#0x01-php-%E8%B0%83%E7%94%A8-api"><span class="toc-text">0x01 PHP 调用 API</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#0x02-php-%E8%A7%A3%E6%9E%90-json"><span class="toc-text">0x02 PHP 解析 Json</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#stdclass-object-%E7%9A%84%E8%BF%9B%E4%B8%80%E6%AD%A5%E8%A7%A3%E6%9E%90"><span class="toc-text">StdClass Object 的进一步解析</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#array-%E7%9A%84%E8%BF%9B%E4%B8%80%E6%AD%A5%E8%A7%A3%E6%9E%90"><span class="toc-text">Array 的进一步解析</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#0x03-for-%E5%BE%AA%E7%8E%AF%E7%9A%84%E7%AE%80%E5%8D%95%E5%BA%94%E7%94%A8"><span class="toc-text">0x03 For 循环的简单应用</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#0x04-php-%E4%B8%8B%E8%BD%BD%E6%96%87%E4%BB%B6"><span class="toc-text">0x04 PHP 下载文件</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#0x05-php-%E5%88%A4%E6%96%AD%E4%B8%80%E4%B8%AA%E6%96%87%E4%BB%B6%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8"><span class="toc-text">0x05 PHP 判断一个文件是否存在</span></a></li></ol></div></aside><a class="btn-toc button" id="btn-toc" tabindex="0"><svg viewBox="0 0 1024 1024" width="32" height="32" xmlns="http://www.w3.org/2000/svg"><path d="M128 256h64V192H128zM320 256h576V192H320zM128 544h64v-64H128zM320 544h576v-64H320zM128 832h64v-64H128zM320 832h576v-64H320z" fill="currentColor"></path></svg></a><div class="toc-menus" id="toc-menus"><div class="toc-title">文章目录</div><ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#0x01-php-%E8%B0%83%E7%94%A8-api"><span class="toc-text">0x01 PHP 调用 API</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#0x02-php-%E8%A7%A3%E6%9E%90-json"><span class="toc-text">0x02 PHP 解析 Json</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#stdclass-object-%E7%9A%84%E8%BF%9B%E4%B8%80%E6%AD%A5%E8%A7%A3%E6%9E%90"><span class="toc-text">StdClass Object 的进一步解析</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#array-%E7%9A%84%E8%BF%9B%E4%B8%80%E6%AD%A5%E8%A7%A3%E6%9E%90"><span class="toc-text">Array 的进一步解析</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#0x03-for-%E5%BE%AA%E7%8E%AF%E7%9A%84%E7%AE%80%E5%8D%95%E5%BA%94%E7%94%A8"><span class="toc-text">0x03 For 循环的简单应用</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#0x04-php-%E4%B8%8B%E8%BD%BD%E6%96%87%E4%BB%B6"><span class="toc-text">0x04 PHP 下载文件</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#0x05-php-%E5%88%A4%E6%96%AD%E4%B8%80%E4%B8%AA%E6%96%87%E4%BB%B6%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8"><span class="toc-text">0x05 PHP 判断一个文件是否存在</span></a></li></ol></div><article class="post post__with-toc card"><div class="post__header"><img alt="Cover Image" class="lazy" src="https://hans362-img.oss.0vv0.top/2019/05/11/code-944499_1280.jpg?width=1920" srcset="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAABlBMVEXMzMyWlpYU2uzLAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAACklEQVQImWNgAAAAAgAB9HFkpgAAAABJRU5ErkJggg==" data-srcset="https://hans362-img.oss.0vv0.top/2019/05/11/code-944499_1280.jpg?width=1920"><div class="post__expire" id="post-expired-notify"><p><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16" style="fill:#f5a623;stroke:#f5a623"><path fill-rule="evenodd" d="M8.893 1.5c-.183-.31-.52-.5-.887-.5s-.703.19-.886.5L.138 13.499a.98.98 0 0 0 0 1.001c.193.31.53.501.886.501h13.964c.367 0 .704-.19.877-.5a1.03 1.03 0 0 0 .01-1.002L8.893 1.5zm.133 11.497H6.987v-2.003h2.039v2.003zm0-3.004H6.987V5.987h2.039v4.006z"></path></svg> 本文最后更新于 <span id="expire-date"></span> 天前，文中部分描述可能已经过时。</p></div><script>(()=>{var e=Date.parse("2019-02-18"),t=(new Date).getTime(),t=Math.floor((t-e)/864e5);120<=t&&(document.querySelectorAll("#expire-date")[0].innerHTML=t,document.querySelectorAll("#post-expired-notify")[0].style.display="block")})()</script></div><div class="post__content"><html><head><script>var meting_api="https://api-v2.hans362.cn/vip/?server=:server&type=:type&id=:id&r=:r"</script><script class="meting-secondary-script-marker" src="/js/Meting.min.js"></script></head><body><p>这段时间在开发<a href="https://blog.hans362.cn/%E3%80%90%E9%A1%B9%E7%9B%AE%E5%8F%91%E5%B8%83%E3%80%91%E8%BF%BD%E7%95%AA%E5%88%97%E8%A1%A8%E5%B1%95%E7%A4%BAAPI/">追番列表展示API</a>（人生中第一个PHP项目啊…），迫于没有系统地学习过PHP只是略知一二，在开发的过程中可以说是到处是坑，于是乎…在我努力地现学现卖的过程下，还是<s>顺利</s>地写完了这个程序</p><p>至于运行的效率以及代码质量么…不管了…（自信</p><p><img src="https://hans362-img.oss.0vv0.top/2019/02/18/ybsbny.jpeg?width=1920" class="lazy" data-srcset="https://hans362-img.oss.0vv0.top/2019/02/18/ybsbny.jpeg?width=1920" srcset="/loading.gif" alt=""></p><p>那么针对踩过的坑就记录一下吧~（先说明一下 PHP 版本为7.1.26）</p><span id="more"></span><h2 id="0x01-php-调用-api"><a class="markdownIt-Anchor" href="#0x01-php-调用-api"></a> 0x01 PHP 调用 API</h2><p>本案例中 API 为 BiliBili 的 Bangumi API：</p><p><code>https://space.bilibili.com/ajax/Bangumi/getList?mid={user.id}</code></p><p>其中<code>{user.id}</code>为用户的UID</p><p>正确请求后可得到 json 返回该用户的追番列表</p><p>那么 PHP 应该如何调用这个 API 并将返回的 json 存储于变量中呢？</p><p>首先建立一个 function</p><pre><code class="hljs awk"><span class="hljs-keyword">function</span> curl_get_https(<span class="hljs-variable">$url</span>) {
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<span class="hljs-variable">$curl</span> = curl_init(); <span class="hljs-regexp">//</span> 启动一个CURL会话
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curl_setopt(<span class="hljs-variable">$curl</span>, CURLOPT_URL, <span class="hljs-variable">$url</span>);
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curl_setopt(<span class="hljs-variable">$curl</span>, CURLOPT_RETURNTRANSFER, <span class="hljs-number">1</span>); <span class="hljs-regexp">//</span> TRUE 将curl_exec()获取的信息以字符串返回，而不是直接输出。
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curl_setopt(<span class="hljs-variable">$curl</span>, CURLOPT_SSL_VERIFYPEER, false); <span class="hljs-regexp">//</span> 跳过证书检查
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<span class="hljs-variable">$tmpInfo</span> = curl_exec(<span class="hljs-variable">$curl</span>); <span class="hljs-regexp">//</span> 返回api的json对象
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curl_close(<span class="hljs-variable">$curl</span>);
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return <span class="hljs-variable">$tmpInfo</span>; <span class="hljs-regexp">//</span> 返回json对象
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}</code></pre><p>搞定后程序中就可以随时调用这个function</p><pre><code class="hljs reasonml">$uid = $_GET<span class="hljs-literal">["<span class="hljs-identifier">uid</span>"]</span>; <span class="hljs-comment">//获取提交的UID</span>
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$file = curl<span class="hljs-constructor">_get_https('<span class="hljs-params">https</span>:<span class="hljs-operator">/</span><span class="hljs-operator">/</span><span class="hljs-params">space</span>.<span class="hljs-params">bilibili</span>.<span class="hljs-params">com</span><span class="hljs-operator">/</span><span class="hljs-params">ajax</span><span class="hljs-operator">/</span>Bangumi<span class="hljs-operator">/</span><span class="hljs-params">getList</span>?<span class="hljs-params">mid</span>=' . $<span class="hljs-params">uid</span>)</span>;</code></pre><p>这样返回的json就被存储于<code>$file</code>变量中了</p><h2 id="0x02-php-解析-json"><a class="markdownIt-Anchor" href="#0x02-php-解析-json"></a> 0x02 PHP 解析 Json</h2><p>假设 json 数据已经存储与<code>$file</code>变量中，解析 json 非常简单：</p><pre><code class="hljs arcade"><span class="hljs-symbol">$res</span> = json_decode(<span class="hljs-symbol">$file</span>);</code></pre><p>但是请注意，这种方式 json 将以 StdClass Object 的形式存储，如果需要以 Array 的形式存储，则应该这样：</p><pre><code class="hljs arcade"><span class="hljs-symbol">$res</span> = json_decode(<span class="hljs-symbol">$file</span>, <span class="hljs-literal">true</span>);</code></pre><h3 id="stdclass-object-的进一步解析"><a class="markdownIt-Anchor" href="#stdclass-object-的进一步解析"></a> StdClass Object 的进一步解析</h3><p>假设解析后的内容存储于<code>$res</code>中，<code>$res</code>下有一个分项叫<code>data</code>，<code>data</code>下有一个分项叫<code>pages</code>，那我要获取<code>pages</code>的值，应该怎么办呢？</p><p><code>$pages = $res->data->pages;</code></p><p>这样就可以将<code>pages</code>的值存储于<code>$pages</code>中</p><h3 id="array-的进一步解析"><a class="markdownIt-Anchor" href="#array-的进一步解析"></a> Array 的进一步解析</h3><p>假设解析后的内容存储于<code>$res</code>中</p><p>首先要清楚 Array 的结构，用以下代码可输出：</p><p><code>print_r($res);</code></p><p>接着就要用到<code>foreach()</code>函数一层层完成遍历，相关用法不再赘述，可自行查找相关资料</p><h2 id="0x03-for-循环的简单应用"><a class="markdownIt-Anchor" href="#0x03-for-循环的简单应用"></a> 0x03 For 循环的简单应用</h2><pre><code class="hljs awk"><span class="hljs-keyword">for</span> (<span class="hljs-variable">$x</span> = <span class="hljs-number">1</span>; <span class="hljs-variable">$x</span> <= <span class="hljs-number">10</span>; <span class="hljs-variable">$x</span>++) {
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<span class="hljs-regexp">//</span> Put your code here.
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}</code></pre><p>以上代码可完成<code>$x</code>从1至10的循环</p><h2 id="0x04-php-下载文件"><a class="markdownIt-Anchor" href="#0x04-php-下载文件"></a> 0x04 PHP 下载文件</h2><p>假设要下载到运行目录下的 cache 目录，下载链接存储于<code>$url</code>变量中</p><pre><code class="hljs mel">$url = $result[<span class="hljs-string">'cover'</span>];
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$path = <span class="hljs-string">'cache/'</span>;
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$ch = curl_init();
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curl_setopt($ch, CURLOPT_URL, $url);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, <span class="hljs-number">1</span>);
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curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, <span class="hljs-number">30</span>);
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$img = curl_exec($ch);
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curl_close($ch);
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$filename = pathinfo($url, PATHINFO_BASENAME);
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$resource = <span class="hljs-keyword">fopen</span>($path . $filename, <span class="hljs-string">'a'</span>);
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<span class="hljs-keyword">fwrite</span>($resource, $img);
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<span class="hljs-keyword">fclose</span>($resource);</code></pre><h2 id="0x05-php-判断一个文件是否存在"><a class="markdownIt-Anchor" href="#0x05-php-判断一个文件是否存在"></a> 0x05 PHP 判断一个文件是否存在</h2><p>假设文件名存储于<code>$filename</code>变量中</p><pre><code class="hljs kotlin"><span class="hljs-keyword">if</span> (file_exists($filename)) {
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<span class="hljs-keyword">return</span> <span class="hljs-literal">true</span>;
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} <span class="hljs-keyword">else</span> {
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<span class="hljs-keyword">return</span> <span class="hljs-literal">false</span>;
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}</code></pre><p>好啦暂时就整理这么多，由于本人没有系统地学习过 PHP，本文中的部分表述可能存在漏洞或描述不清，各位大佬轻喷…如果您发现本文中有错误请务必在下方评论区指出，我会感激不尽~</p></body></html></div><div class="license"><div class="license-title">PHP踩坑记录#1</div><div class="license-link"><a href="https://blog.hans362.cn/post/php-tips-1/">https://blog.hans362.cn/post/php-tips-1/</a></div><div class="license-meta"><div class="license-meta-item"><div class="license-meta-title">本文作者</div><div class="license-meta-text">Hans362</div></div><div class="license-meta-item"><div class="license-meta-title">最后更新</div><div class="license-meta-text">2019-02-18</div></div><div class="license-meta-item"><div class="license-meta-title">许可协议</div><div class="license-meta-text"><a href="https://creativecommons.org/licenses/by-nc-sa/4.0/deed.zh" rel="nofollow noopener noreferrer" target="_blank">CC BY-NC-SA 4.0</a></div></div></div><div>转载或引用本文时请遵守许可协议，注明出处、不得用于商业用途！</div></div><div class="post-footer__cats"><a href="/categories/%E6%8A%80%E6%9C%AF%E5%90%91/" class="post-cats__link button">技术向</a><a href="/tags/Web/" class="post-tags__link button"># Web</a><a href="/tags/PHP/" class="post-tags__link button"># PHP</a></div></article><div class="nav"><div class="nav__prev"><a href="/post/2019-shanghai-hsee/" class="nav__link"><div><svg viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" width="24" height="24"><path d="M589.088 790.624L310.464 512l278.624-278.624 45.248 45.248L400.96 512l233.376 233.376z" fill="#808080"></path></svg></div><div><div class="nav__label">上一篇</div><div class="nav__title">2019年上海中考大吐槽¯\_(ツ)_/¯</div></div></a></div><div class="nav__next"><a href="/post/bangumi-list-display/" class="nav__link"><div><div class="nav__label">下一篇</div><div class="nav__title">【项目发布】追番列表展示API</div></div><div><svg viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" width="24" height="24"><path d="M434.944 790.624l-45.248-45.248L623.04 512l-233.376-233.376 45.248-45.248L713.568 512z" fill="#808080"></path></svg></div></a></div></div><div class="post__sponsers card"><div class="sponser-label">喜欢这篇文章吗？考虑支持一下作者吧～</div><a class="sponser-button button" href="https://afdian.net/@hans362" rel="external nofollow noreferrer" target="_blank" data-type="afdian">爱发电</a> <a class="sponser-button button" data-type="alipay">支付宝<img class="sponser-qrcode" src="https://hans362-img.oss.0vv0.top/2021/08/05/68281340.jpg"></a></div><div class="post__comments post__with-toc card" id="comment"><h4>评论</h4><div id="disqus_thread">您所在的地区可能无法访问 Disqus 评论系统，请切换网络环境再尝试。</div></div></div></main><footer><p class="footer-copyright">Copyright © 2017 - 2025 <a href="/">Hans362 's Blog</a></p><p>Powered by <a href="https://hexo.io" target="_blank">Hexo</a> | Theme - <a href="https://github.com/ChrAlpha/hexo-theme-cards" target="_blank">Cards</a></p><script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script><ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-8746554831230893" data-ad-slot="6356225601" data-ad-format="auto" data-full-width-responsive="true"></ins><script>(adsbygoogle=window.adsbygoogle||[]).push({})</script></footer></div><script defer src="https://blog.hans362.cn/npm/vanilla-lazyload@17.8.3/dist/lazyload.min.js"></script><script>window.lazyLoadOptions={elements_selector:".lazy"}</script><script async defer data-website-id="5d181692-8a81-4c20-a282-cee87a6b90ef" src="https://analytics.0vv0.top/vue.js"></script><script src="/js/pageviews.js"></script><link rel="stylesheet" href="https://blog.hans362.cn/npm/katex@0.16.0/dist/katex.min.css" crossorigin="anonymous"><script>function loadComment(){let n,e;(n=document.createElement("script")).src="https://blog.hans362.cn/js/disqus.js",document.body.appendChild(n),n.onload=()=>{new DisqusJS({shortname:"hans362-s-blog",siteName:"Hans362 's Blog",api:"https://api-v3.hans362.cn/",apikey:"8Z1UVT4UOk22yNyk9MhpqQ0FLb27Hb1bpV066b4v9zOFie0GQ6VCoJ9TJwoGlCVF",admin:"hans362",identifier:"post/php-tips-1/",url:"https://blog.hans362.cn/post/php-tips-1/",nesting:"4"})},(e=document.createElement("link")).rel="stylesheet",e.href="https://blog.hans362.cn/css/disqusjs.css",document.head.appendChild(e)}var runningOnBrowser="undefined"!=typeof window,isBot=runningOnBrowser&&!("onscroll"in window)||"undefined"!=typeof navigator&&/(gle|ing|ro|msn)bot|crawl|spider|yand|duckgo/i.test(navigator.userAgent),supportsIntersectionObserver=runningOnBrowser&&"IntersectionObserver"in window;setTimeout(function(){var e;!isBot&&supportsIntersectionObserver?(e=new IntersectionObserver(function(n){n[0].isIntersecting&&(loadComment(),e.disconnect())},{threshold:[0]})).observe(document.getElementById("comment")):loadComment()},1)</script></body></html> |