<分区>
我正在尝试将大约 20k 条记录从 mysql 中的表导出到 csv 并且正如预期的那样它使我的系统崩溃，是否有其他方法可以避免崩溃？
这是我当前的导出代码:
$filename2 = "csv/leads_".date("M-d-Y",time()).".csv";
$fp2 = fopen($filename2, 'w') or die("can't open file");
$sql2 = $sql_getcustomers;
$res2 = mysql_query($sql2);
// fetch a row and write the column names out to the file
$row2 = mysql_fetch_assoc($res2);
$line = "";
$comma = "";
if($row2){
foreach($row2 as $name => $value) {
$line .= $comma . '"' . str_replace('"', '""', $name) . '"';
$comma = ",";
}
$line .= ",crm_group";
$line .= "\n";
fwrite($fp2, $line);
// remove the result pointer back to the start
mysql_data_seek($res2, 0);
// and loop through the actual data
while($row2 = mysql_fetch_assoc($res2)) {
$line = "";
$comma = "";
foreach($row2 as $index => $value) {
$line .= $comma . '"' . str_replace('"', '""', utf8_decode($value)) . '"';
$comma = ",";
}
//** GET THE CRM GROUPS
$sql_get_group = "SELECT a.crm_group_name, b.* FROM tbl_crm_members b JOIN tbl_crm_groups a ON (a.crm_gid = b.crm_groupid) WHERE crm_uid = ".$row2["uid"];
$sql_get_groups = mysql_query($sql_get_group);
$res_get_groups = "";
while($sgg = mysql_fetch_object($sql_get_groups)) $res_get_groups .= $sgg->crm_group_name.";";
$line .= ",".trim($res_get_groups, ";");
$line .= "\n";
fwrite($fp2, $line);
}
fclose($fp2);