我必须编写一个PHP脚本,它将脚本从给定的CSV文件导入MySQL数据库。给定的CSV文件最多可以包含200,000行。我尝试了以下方法,但出现了问题:
现在,我正在考虑通过将CSV文件拆分为较小的块,然后异步插入它们的解决方案。我已经完成了CSV的拆分,但是目前不知道如何以快速安全的方式异步插入数据库。但是我听说我将在这里使用Ajax。
您可以推荐任何解决方案吗?在此先多谢!
感谢所有为这个问题提供答案的人。我发现了解决方案!我只是想分享它,以防万一有人需要创建一个PHP脚本来将一个巨大的CSV文件导入到MySQL数据库中(异步且快速!),我已经测试了40万行代码,并在几秒钟内完成了导入。我相信它将适用于较大的文件,您只需要修改最大上传文件大小即可。
在此示例中,我将一个包含两列(名称,contact_number)的CSV文件导入到包含相同列的MySQL数据库中。
您的CSV文件应如下所示:
安娜,0906123489
约翰,0908989199
彼得,0908298392
...
...
所以,这是解决方案。
首先,创建表格
CREATE TABLE `testdb`.`table_test`
( `id` INT NOT NULL AUTO_INCREMENT ,
`name` VARCHAR(100) NOT NULL ,
`contact_number` VARCHAR(100) NOT NULL ,
PRIMARY KEY (`id`)) ENGINE = InnoDB;
其次,我有4个PHP文件。您所要做的就是将其放入单个文件夹中。PHP文件如下:
index.php
<form action="upload.php" method="post" enctype="multipart/form-data">
<input type="file" name="csv" value="" />
<input type="submit" name="submit" value="Save" /></form>
connect.php
<?php
//modify your connections here
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "testDB";
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
?>
senddata.php
<?php
include('connect.php');
$data = $_POST['file'];
$handle = fopen($data, "r");
$test = file_get_contents($data);
if ($handle) {
$counter = 0;
//instead of executing query one by one,
//let us prepare 1 SQL query that will insert all values from the batch
$sql ="INSERT INTO table_test(name,contact_number) VALUES ";
while (($line = fgets($handle)) !== false) {
$sql .= "($line),";
$counter++;
}
$sql = substr($sql, 0, strlen($sql) - 1);
if ($conn->query($sql) === TRUE) {
} else {
}
fclose($handle);
} else {
}
//unlink CSV file once already imported to DB to clear directory
unlink($data);
?>
upload.php
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.1/jquery.js"></script>
<script>
//Declaration of function that will insert data into database
function senddata(filename){
var file = filename;
$.ajax({
type: "POST",
url: "senddata.php",
data: {file},
async: true,
success: function(html){
$("#result").html(html);
}
})
}
</script>
<?php
$csv = array();
$batchsize = 1000; //split huge CSV file by 1,000, you can modify this based on your needs
if($_FILES['csv']['error'] == 0){
$name = $_FILES['csv']['name'];
$ext = strtolower(end(explode('.', $_FILES['csv']['name'])));
$tmpName = $_FILES['csv']['tmp_name'];
if($ext === 'csv'){ //check if uploaded file is of CSV format
if(($handle = fopen($tmpName, 'r')) !== FALSE) {
set_time_limit(0);
$row = 0;
while(($data = fgetcsv($handle)) !== FALSE) {
$col_count = count($data);
//splitting of CSV file :
if ($row % $batchsize == 0):
$file = fopen("minpoints$row.csv","w");
endif;
$csv[$row]['col1'] = $data[0];
$csv[$row]['col2'] = $data[1];
$min = $data[0];
$points = $data[1];
$json = "'$min', '$points'";
fwrite($file,$json.PHP_EOL);
//sending the splitted CSV files, batch by batch...
if ($row % $batchsize == 0):
echo "<script> senddata('minpoints$row.csv'); </script>";
endif;
$row++;
}
fclose($file);
fclose($handle);
}
}
else
{
echo "Only CSV files are allowed.";
}
//alert once done.
echo "<script> alert('CSV imported!') </script>";
}
?>
而已!您已经有一个纯PHP脚本,可以在几秒钟内导入多个行!:)(感谢我的伴侣教给我有关如何使用ajax的想法)
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