如何使用 PHP 打印 CSV 文件的行？答案

【问题标题】：How to print rows of CSV file with PHP?如何使用 PHP 打印 CSV 文件的行？
【发布时间】：2020-07-01 22:26:53
【问题描述】：

这是我正在使用的代码，但它并没有完全输出我想要的。

<?php
$file = fopen("ad.csv","r");

while(! feof($file))
  {
  print_r(fgetcsv($file));
  }

fclose($file);
?>

这是它当前的输出：

Array ( [0] => cn [1] => mail [2] => telephonenumber [3] => uid ) Array ( [0] => [1] => [2] => [3] => ) Array ( [0] => admin [1] => [2] => [3] => ) Array ( [0] => Isaac Newton [1] => newton@ldap.forumsys.com [2] => [3] => newton ) Array ( [0] => Albert Einstein [1] => einstein@ldap.forumsys.com [2] => 314-159-2653 [3] => einstein ) Array ( [0] => Nikola Tesla [1] => tesla@ldap.forumsys.com [2] => [3] => tesla ) Array ( [0] => Galileo Galilei [1] => galieleo@ldap.forumsys.com [2] => [3] => galieleo ) Array ( [0] => Leonhard Euler [1] => euler@ldap.forumsys.com [2] => [3] => euler ) Array ( [0] => Carl Friedrich Gauss [1] => gauss@ldap.forumsys.com [2] => [3] => gauss ) Array ( [0] => Bernhard Riemann [1] => riemann@ldap.forumsys.com [2] => [3] => riemann ) Array ( [0] => Euclid [1] => euclid@ldap.forumsys.com [2] => [3] => euclid ) Array ( [0] => Mathematicians [1] => [2] => [3] => ) Array ( [0] => Scientists [1] => [2] => [3] => ) Array ( [0] => read-only-admin [1] => [2] => [3] => ) Array ( [0] => Italians [1] => [2] => [3] => ) Array ( [0] => Test [1] => [2] => [3] => test ) Array ( [0] => Chemists [1] => [2] => [3] => ) Array ( [0] => Marie Curie [1] => curie@ldap.forumsys.com [2] => [3] => curie ) Array ( [0] => Alfred Nobel [1] => nobel@ldap.forumsys.com [2] => [3] => nobel ) Array ( [0] => Robert Boyle [1] => boyle@ldap.forumsys.com [2] => 999-867-5309 [3] => boyle ) Array ( [0] => Louis Pasteur [1] => pasteur@ldap.forumsys.com [2] => 602-214-4978 [3] => pasteur ) Array ( [0] => No Group [1] => nogroup@ldap.forumsys.com [2] => [3] => nogroup ) Array ( [0] => FS Training [1] => training@forumsys.com [2] => 888-111-2222 [3] => training ) Array ( [0] => FS Training [1] => jmacy-training@forumsys.com [2] => 888-111-2222 [3] => jmacy )

换句话说，它几乎就像是将我所有的 CSV 数据添加到一个多维数组中......

我想要的是像这样输出它：

cn,mail,telephonenumber,uid
,,,
admin,,,
"Isaac Newton",newton@ldap.forumsys.com,,newton
"Albert Einstein",einstein@ldap.forumsys.com,314-159-2653,einstein
"Nikola Tesla",tesla@ldap.forumsys.com,,tesla
"Galileo Galilei",galieleo@ldap.forumsys.com,,galieleo
"Leonhard Euler",euler@ldap.forumsys.com,,euler
"Carl Friedrich Gauss",gauss@ldap.forumsys.com,,gauss
"Bernhard Riemann",riemann@ldap.forumsys.com,,riemann
Euclid,euclid@ldap.forumsys.com,,euclid
Mathematicians,,,
Scientists,,,
read-only-admin,,,
Italians,,,
Test,,,test
Chemists,,,
"Marie Curie",curie@ldap.forumsys.com,,curie
"Alfred Nobel",nobel@ldap.forumsys.com,,nobel
"Robert Boyle",boyle@ldap.forumsys.com,999-867-5309,boyle
"Louis Pasteur",pasteur@ldap.forumsys.com,602-214-4978,pasteur
"No Group",nogroup@ldap.forumsys.com,,nogroup
"FS Training",training@forumsys.com,888-111-2222,training
"FS Training",jmacy-training@forumsys.com,888-111-2222,jmacy

【问题讨论】：

why while(!feof($file)) is wrong
fgetcsv() 的重点在于它将 CSV 行解析为数组。如果您不希望它是一个数组，请使用fgets()。
如果你只想打印整个CSV文件，使用readfile("ad.csv");你根本不需要循环。

标签： php arrays csv ldap

【解决方案1】：

How to parse a CSV file using PHP 有有趣的建议

顺便说一句，在 php 7.2 中这也可以：

    <?php
    $row = 1;
    if (($handle = fopen("ad.csv", "r")) !== FALSE) {
        while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
            echo ($data[0].",".$data[1].",".$data[2].",".$data[3]."\n");
        }
        fclose($handle);
    }
    ?>

此外，.csv 数据上的引号应包含所有数据，例如：

"Isaac Newton","newton@ldap.forumsys.com",,"newton"
"Albert Einstein","einstein@ldap.forumsys.com","314-159-2653","einstein"
"Nikola Tesla","tesla@ldap.forumsys.com",,"tesla"
"Galileo Galilei","galieleo@ldap.forumsys.com",,"galieleo"

【讨论】：