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工作中经常要遇到将xlsx文件中的部分内容导入到数据库。通常我们都是用PHPExcel来读取。
通过下面的方法我们可以很容易将一个excel表格读取成为php数组，之后就可以为所欲为了：
<ol>
<li><span><span>$</span><span>input_file</span><span> = </span><span>"data.xlsx"</span><span>; </span></span></li>
<li><span>$<span>objPHPExcel</span><span> = </span><span>PHPExcel_IOFactory</span><span>::load($input_file); </span></span></li>
<li><span>$<span>sheetData</span><span> = $objPHPExcel-</span><span>></span><span>getSheet(0)-</span><span>></span><span>toArray(null, true, true, true); </span></span></li>
</ol><p>如果文章到此结束，那价值就不大了。</p><p><span>立即学习</span>“<a href="https://pan.quark.cn/s/7fc7563c4182" style="text-decoration: underline !important; color: blue; font-weight: bolder;" rel="nofollow" target="_blank">PHP免费学习笔记（深入）</a>”；</p><p>很不幸的情况总是存在的，当data.xlsx有上万行，每一行又有很多列，每一列又有很长的字符串，并且有的还有颜色等效果时，用上面的方法经常发生的情况就是内存不足。</p><p>好吧，我们还有ini_set来加大内存，还可以用set_time_limit来设置较长的超时，如下：</p><pre class="brush:php;toolbar:false;" courier new font-size:12px overflow:auto width:710.8125px><ol>
<li><span><span>set_time_limit(90); </span></span></li>
<li><span>ini_set("memory_limit", "1024M"); </span></li>
<li><span>$<span>input_file</span><span> = </span><span>"data.xlsx"</span><span>; </span></span></li>
<li><span>$<span>objPHPExcel</span><span> = </span><span>PHPExcel_IOFactory</span><span>::load($input_file); </span></span></li>
<li><span>$<span>sheetData</span><span> = $objPHPExcel-</span><span>></span><span>getSheet(0)-</span><span>></span><span>toArray(null, true, true, true); </span></span></li>
</ol><p>但很负责任的说，这些都不是终极的方案。</p><div class="aritcle_card flexRow">
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</div><p>我曾经试过将内存设置到了2G，超时设置到了90秒，也仍然读不出一个4000行的花花绿绿的表格。原因都出在toArray这个方法上，它会将处理的结果全保存到数组中，这种方式在处理简单表格时还是很方便的，但在处理大表格时，真的是很杯具。</p><p><span><span>我们的解决方案如下：</span></span></p><pre class="brush:php;toolbar:false;" courier new font-size:12px overflow:auto width:710.8125px><ol>
<li><span><span>require 'lib/PHPExcel.php'; </span></span></li>
<li><span> </span></li>
<li><span>set_time_limit(90); </span></li>
<li><span>$<span>input_file</span><span> = </span><span>"data.xlsx"</span><span>; </span></span></li>
<li><span>$<span>objPHPExcel</span><span> = </span><span>PHPExcel_IOFactory</span><span>::load($input_file); </span></span></li>
<li><span> </span></li>
<li><span>// 读取规则 </span></li>
<li><span>$<span>sheet_read_arr</span><span> = </span><span>array</span><span>(); </span></span></li>
<li><span>$sheet_read_arr["sheet1"] = array("A","B","C","D","F"); </span></li>
<li><span>$sheet_read_arr["sheet2"] = array("A","B","C","D","F"); </span></li>
<li><span> </span></li>
<li><span>// 循环所有的页 </span></li>
<li><span>foreach ($sheet_read_arr as $<span>key</span><span> =</span><span>></span><span> $val) </span></span></li>
<li><span>{ </span></li>
<li><span> $<span>currentSheet</span><span> = $objPHPExcel-</span><span>></span><span>getSheetByName($key);// 通过页名称取得当前页 </span></span></li>
<li><span> $<span>row_num</span><span> = $currentSheet-</span><span>></span><span>getHighestRow();// 当前页行数 </span></span></li>
<li><span> </span></li>
<li><span> // 循环从第二行开始，第一行往往是表头 </span></li>
<li><span> for ($<span>i</span><span> = </span><span>2</span><span>; $i </span><span><span>= $row_num; $i++) </span></span></span></li>
<li><span> { </span></li>
<li><span> $<span>cell_values</span><span> = </span><span>array</span><span>(); </span></span></li>
<li><span> foreach ($val as $cell_val) </span></li>
<li><span> { </span></li>
<li><span> $<span>address</span><span> = $cell_val . $i;// 单元格坐标 </span></span></li>
<li><span> </span></li>
<li><span> // 读取单元格内容 </span></li>
<li><span> $cell_values[] = $currentSheet-<span>></span><span>getCell($address)-</span><span>></span><span>getFormattedValue(); </span></span></li>
<li><span> } </span></li>
<li><span> </span></li>
<li><span> // 看看数据 </span></li>
<li><span> print_r($cell_values); </span></li>
<li><span> } </span></li>
<li><span>} </span></li>
</ol><p>上面的方式算是较复杂的情况了，如果只是想将所有的单元格全读出来，用下面的方法就行了：</p><pre class="brush:php;toolbar:false;" courier new font-size:12px overflow:auto width:710.8125px><ol>
<li><span><span>require 'lib/PHPExcel.php'; </span></span></li>
<li><span> </span></li>
<li><span>set_time_limit(90); </span></li>
<li><span>$<span>input_file</span><span> = </span><span>"data.xlsx"</span><span>; </span></span></li>
<li><span>$<span>objPHPExcel</span><span> = </span><span>PHPExcel_IOFactory</span><span>::load($input_file); </span></span></li>
<li><span> </span></li>
<li><span>$<span>sheet_count</span><span> = $objPHPExcel-</span><span>></span><span>getSheetCount(); </span></span></li>
<li><span>for ($<span>s</span><span> = </span><span>0</span><span>; $s </span><span><span> $sheet_count; $s++) </span></span></span></li>
<li><span>{ </span></li>
<li><span> $<span>currentSheet</span><span> = $objPHPExcel-</span><span>></span><span>getSheet($s);// 当前页 </span></span></li>
<li><span> $<span>row_num</span><span> = $currentSheet-</span><span>></span><span>getHighestRow();// 当前页行数 </span></span></li>
<li><span> $<span>col_max</span><span> = $currentSheet-</span><span>></span><span>getHighestColumn(); // 当前页最大列号 </span></span></li>
<li><span> </span></li>
<li><span> // 循环从第二行开始，第一行往往是表头 </span></li>
<li><span> for($<span>i</span><span> = </span><span>2</span><span>; $i </span><span><span>= $row_num; $i++) </span></span></span></li>
<li><span> { </span></li>
<li><span> $<span>cell_values</span><span> = </span><span>array</span><span>(); </span></span></li>
<li><span> for($<span>j</span><span> = </span><span>'A'</span><span>; $j </span><span><span> $col_max; $j++) </span></span></span></li>
<li><span> { </span></li>
<li><span> $<span>address</span><span> = $j . $i; // 单元格坐标 </span></span></li>
<li><span> $cell_values[] = $currentSheet-<span>></span><span>getCell($address)-</span><span>></span><span>getFormattedValue(); </span></span></li>
<li><span> } </span></li>
<li><span> </span></li>
<li><span> // 看看数据 </span></li>
<li><span> print_r($cell_values); </span></li>
<li><span> } </span></li>
<li><span>} </span></li>
</ol><p>我们可以将上面的print_r地方改成组拼sql语句并写入文件，然后用mysql导入，当然也可以直接连接数据库向表中插入记录，这就随意了。</p><p>用这种方法可以将上万行的记录很轻松的导入到表中，希望对大家有所帮助。</p><p>本文出自 “凡星的技术博客” 博客，请务必保留此出处http://ustb80.blog.51cto.com/6139482/1066505</p>
<p>
以上就介绍了如何用PHPExcel读取超大excel文件，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。</p>
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