Php excel导出无法从mysql获取太多数据
我有一个用php从mysql获取数据并将其导出到excel文件的代码,它是这样的:Php excel导出无法从mysql获取太多数据,php,mysql,excel,Php,Mysql,Excel,我有一个用php从mysql获取数据并将其导出到excel文件的代码,它是这样的: <?php $xls_filename = "export_".rand(100000,999999).".xls"; // Define Excel (.xls) file name // Header info settings header("Content-Type: application/xls"); header("Content-Disposition: attachment; filen
<?php
$xls_filename = "export_".rand(100000,999999).".xls"; // Define Excel (.xls) file name
// Header info settings
header("Content-Type: application/xls");
header("Content-Disposition: attachment; filename=$xls_filename");
header("Pragma: no-cache");
header("Expires: 0");
/***** Start of Formatting for Excel *****/
// Define separator (defines columns in excel & tabs in word)
$sep = "\t"; // tabbed character
$slct2 = $dbh->prepare("SELECT * FROM forms_answers WHERE ans_formid='{$identity}'");
$slct2->execute();
while($name = $slct2->fetch(PDO::FETCH_ASSOC)) {
$stmt2 = $dbh->prepare("SELECT * FROM forms_answers_details WHERE ans_id='{$name['ans_id']}'");
$stmt2->execute();
// Start of printing column names as names of MySQL fields
for($i=0; $i<$stmt2->columnCount(); $i++) {
echo $stmt2->getColumnMeta($i)."\t";
}
print("\n");
// End of printing column names
// Start while loop to get data
while($row = $stmt2->fetch(PDO::FETCH_ASSOC)) {
$schema_insert = "";
for($j=0; $j<$stmt2->columnCount(); $j++) {
if(!isset($row[$j])) {
$schema_insert .= "NULL".$sep;
}
elseif(isset($row[$j])) {
$schema_insert .= "$row[$j]".$sep;
}
else {
$schema_insert .= "".$sep;
}
}
$schema_insert = str_replace($sep."$", "", $schema_insert);
$schema_insert = preg_replace("/\r\n|\n\r|\n|\r/", " ", $schema_insert);
$schema_insert .= "\t";
print(trim($schema_insert));
print "\n";
}
}
?>
$slct2=$dbh->prepare(“从表单中选择*,其中ans\u formid='{$identity}'限制1000”)
$stmt2=$dbh->prepare(“从表单答案详细信息中选择*,其中ans_id='{$name['ans_id']}'限制1000”)
试试这个,Db服务器可能会设置限制
根据数据更改限额
否则,由于内存和执行时间不足,它的进程也有可能中途中断
试着用这两行
ini设置(“最大执行时间”,300)
ini_集('内存限制','512M')
在提取数据之前,将这两行放在最前面
这将对您有所帮助。您能和我们分享一个例子吗?您需要在crunch中导出数据,即在sql查询中设置限制