我正在尝试插入一个至少有 20k 行的 csv 文件，它会提示我的浏览器自行杀死它，我猜它占用了大量内存并且处理速度非常慢，我也在为导出和仍然是同样的问题，浏览器想要自行杀死它需要太多时间。你对我应该如何使它更容易和更快有什么建议吗？
这是我的代码：
进口：
if($_POST) {
$error = 0;
$tmpName = $_SESSION["csv_file"];
$fileExtension = $_SESSION["csv_ext"];
$fieldset = explode(",", trim($_REQUEST["csv_listfields"], ","));
unset($_SESSION["csv_file"]); unset($_SESSION["csv_ext"]);
if($tmpName){
if($fileExtension == 'csv'){
$fp = fopen($tmpName, 'r');
$fr = fread($fp, filesize($tmpName));
$line = explode("\n", $fr);
$field_pairs = array();
$csvpos=array();
$csvpos=$_POST['csv_pos'];
$getCsvPos=array();
$ifNotempty=0;
for($i=0;$i<count($csvpos);$i++){
if($csvpos[$i]!=-1){
$getCsvPos[$ifNotempty] = $csvpos[$i];
$ifNotempty++;
}
}
$fldcolumns = $line[0];
$fldcolumns = array_map("trim_field", explode(",", $fldcolumns));
$forIndexValue=0;
foreach($fieldset as $fld){
$f = explode("=", $fld);
list($dbcol, $colcsv) = explode("=",$fld);
$field_pairs[$dbcol] = $getCsvPos[$forIndexValue] ;
$forIndexValue++;
}
$csvfile = fopen($tmpName, 'r');
$ctr = 0;
$total_uploaded = 0;
while (($datax = fgetcsv($csvfile, 1000, ",")) !== FALSE) {
$insert_crm = array();
$row_hascrm_assigned = false;
if($ctr != 0){
$ins_tbl = array();
$has_val = false;
foreach($field_pairs as $field => $colkey){
if( $datax[$colkey] != '' ) $has_val = true;
if($field != 'crm_group'){
if($field == 'password'){
$ins_tbl[$field] = (strlen($datax[$colkey]) != 64) ? hash("sha256", $datax[$colkey]) : $datax[$colkey];
}elseif($field == 'birthdate' || $field == 'dateIN'){
if($field=="dateIN"){
if($datax[$colkey] == ""){
$date = date("Y-m-d");
}else{
$date = $datax[$colkey];
}
$ins_tbl[$field] = $date;
}
}elseif($field == 'email'){
$ins_tbl[$field] = strtolower($datax[$colkey]);
}else{
$ins_tbl[$field] = mysql_real_escape_string($datax[$colkey]);
}
if($field != "dateIN"){
$ins_tbl["dateIN"] = date("Y-m-d");
}
if($field == "birthdate"){
$ins_tbl[$field] = $datax[$colkey];
}
}else{
foreach( explode(";", $datax[count($fldcolumns) - 1]) as $cg ){
$cg = ($cg == "")?$datax[$colkey]:$cg;
$cg = htmlentities($cg);
$crm_sql = mysql_query("SELECT crm_gid FROM tbl_crm_groups WHERE crm_group_name = '".trim($cg, "'")."'");
if(mysql_num_rows($crm_sql) < 1){
mysql_query("INSERT INTO tbl_crm_groups (crm_group_name, crm_date_created, custom) VALUES ('".$cg."', '".date('Y/m/d H:i:s')."', 1)") or die("</br>Error Message: ".mysql_error());
$crm_gid = mysql_insert_id();
}else{
$crm_gid = ($cg != "" && mysql_num_rows($crm_sql) > 0) ? mysql_result($crm_sql, 0) : 1;
}
if(mysql_num_rows(mysql_query("SELECT * FROM tbl_crm_members WHERE crm_groupid = {$crm_gid} AND crm_uid = {$crm_uid}")) < 1){
if(!in_array("INSERT INTO tbl_crm_members(crm_groupid, crm_uid, datejoined) VALUES('{$crm_gid}', '[give_me_uid]', '".date("Y-m-d")."')", $insert_crm))
$insert_crm[] = "INSERT INTO tbl_crm_members(crm_groupid, crm_uid, datejoined) VALUES('{$crm_gid}', '[give_me_uid]', '".date("Y-m-d")."')";
}
}
}
}
if($has_val){
if(mysql_query("INSERT INTO tbl_members (".implode(',',array_keys($ins_tbl)).") VALUES (\"".implode('","',$ins_tbl)."\")")){
$last_member_inserted = mysql_insert_id();
$total_uploaded++;
if(count($insert_crm) > 0){
foreach($insert_crm as $ic){
mysql_query( str_replace("[give_me_uid]", $last_member_inserted, $ic) );
}
}else{
mysql_query( "INSERT INTO tbl_crm_members(crm_groupid, crm_uid, datejoined) VALUES('1', ".mysql_insert_id().", '".date("Y-m-d")."')" );
}
}
}
}
$ctr++;
}
fclose($fp);
echo "<div style='color: green; margin: 10px;'>STATUS: ".$total_uploaded." record(s) successfully imported. <br/>This page will reload in a couple of seconds.</div>";
}else{
exit("Not a valid csv file uploaded.");
}
unlink($tmpName);
echo "<script type='text/javascript'>setTimeout(function(){parent.location.reload(true);}, 2000);</script>";
}else{
exit("File uploaded improperly.");
}
}
出口：
if(IS_AJAX){
$output = array();
$sql_getcustomers = $_POST['val'];
/* CREATE CSV FILE FOR DOWNLOAD */
$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);
$output['data'] = 1;
$output['file'] = $filename2;
}else{
$output['data'] = 0;
}
}else{
$output['data'] = 0;
}