DBA 函数
目录
- dba_close — 关闭 DBA 数据库
- dba_delete — 删除由键指定的 DBA 条目
- dba_exists — 检查键是否存在
- dba_fetch — 获取由键指定的数据
- dba_firstkey — 获取第一个键
- dba_handlers — 列出所有可用的处理器
- dba_insert — 插入条目
- dba_key_split — 将键的字符串表示分割为数组表示
- dba_list — 列出所有打开的数据库文件
- dba_nextkey — 获取下一个键
- dba_open — 打开数据库
- dba_optimize — 优化数据库
- dba_popen — 打开数据库持久化
- dba_replace — 替换或插入条目
- dba_sync — 同步数据库
＋添加备注
用户贡献的备注 4 notes
Franz Korntner ¶
13 years ago
If you need a 'download data' button that automatically fires up a spreadsheet (like Excel), find that fputcsv() isn't working as expected, that none of the installed DBA database engines create a spreadsheet that can be opened, and that XLS generating components are just too heavy weight, then this might just hit the spot:
<?php
// simple table to present
$data = array(
array('col1','col2'),
array(1,2),
array(3,4)
);
// pretend content (which is XML) is XLS native
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: private", false);
header("Content-Type: application/vnd.ms-excel");
header("Content-Disposition: attachment; filename=\"sheet.xls\";" );
// construct skeleton
$dom = new DOMDocument('1.0', 'utf-8');
$dom->formatOutput = $dom->preserveSpaces = true; // optional
$n = new DOMProcessingInstruction('mso-application', 'progid="Excel.Sheet"');
$dom->appendChild($n);
$workbook = $dom->appendChild(new DOMElement('Workbook'));
$workbook->setAttribute('xmlns','urn:schemas-microsoft-com:office:spreadsheet');
$workbook->setAttribute('xmlns:o','urn:schemas-microsoft-com:office:office');
$workbook->setAttribute('xmlns:x','urn:schemas-microsoft-com:office:excel');
$workbook->setAttribute('xmlns:ss','xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet');
$workbook->setAttribute('xmlns:html','http://www.w3.org/TR/REC-html40');
$styles = $workbook->appendChild(new DOMElement('Styles'));
$style = $styles->appendChild(new DOMElement('Style'));
$style->setAttribute('ss:ID','Default');
$worksheet = $workbook->appendChild(new DOMElement('Worksheet'));
$worksheet->setAttribute('ss:Name','sheet1');
$xmltable = $worksheet->appendChild(new DOMElement('Table'));
// populate with data
foreach ($data as $datarow) {
$xmlrow = $xmltable->appendChild(new DOMElement('Row'));
foreach ($datarow as $datacell) {
$xmlcell = $xmlrow->appendChild(new DOMElement('Cell'));
$xmldata = $xmlcell->appendChild(new DOMElement('Data', $datacell));
$xmldata->setAttribute('ss:Type', is_numeric($datacell) ? 'Number' : 'String');
}
}
// display and quit
echo $dom->saveXML();
?>
kevinphpdotnet at stormtide dot ca ¶
20 years ago
When using db4 on redhat 7.3 you may get signal 11s on the apache child processes. The installation test scripts will report that db4 is working correctly as the cli will not sig 11 out. The solution is to check to see if mod_rewrite is installed with apache, if it is either dereference it from libdb.so.3 or build apache without mod rewrite. Once this is done you will no longer have your child processes dying out and db4 will work. If you do not get a sig 11 after dba_open just ignore this comment.
djm at web dot us dot uu dot net ¶
25 years ago
With db2, you need to call dba_sync() to get the data written to disk; the examples are missing this. db2 uses
the BTREE file format, not the more common HASH.
BTREE is faster, though, in my tests, so it's a good
choice.