- I have my Zend environment and I'm using phpexcelwriter (it is a set of lib/class files to export excel).
- I have a MySQL query which fetch information from six individual tables. (so the query will fetch a record of more than 10,000 records)
- When a single user try to export the record, my system/code works fine and I don't see any issue.
- When more than one user (say two users try to export the record), the CPU usage is >100% and I'm getting an internal error 501 and the system is not responding to the user.
Is there a way to overcome this problem?
Here is my sample code:
Lib File:
<?php
/*
###############################################
#### ####
#### Author : Harish Chauhan ####
#### Updated: 11 Dec,2009 ####
#### Updated By: Vijay Joshi ####
#### ####
###############################################
*/
/*
* Class is used for save the data into microsoft excel format.
* It takes data into array or you can write data column vise.
*/
Class ExcelWriter
{
var $fp=null;
var $error;
var $state="CLOSED";
var $newRow=false;
/*
* @Params : $file : file name of excel file to be created.
* @Return : On Success Valid File Pointer to file
* On Failure return false
*/
function ExcelWriter($file="")
{
return $this->open($file);
}
/*
* @Params : $file : file name of excel file to be created.
* if you are using file name with directory i.e. test/myFile.xls
* then the directory must be existed on the system and have permissioned properly
* to write the file.
* @Return : On Success Valid File Pointer to file
* On Failure return false
*/
function open($file)
{
if($this->state!="CLOSED")
{
$this->error="Error : Another file is opend .Close it to save the file";
return false;
}
if(!empty($file))
{
$this->fp=@fopen($file,"w+");
}
else
{
$this->error="Usage : New ExcelWriter('fileName')";
return false;
}
if($this->fp==false)
{
$this->error="Error: Unable to open/create File.You may not have permmsion to write the file.";
return false;
}
$this->state="OPENED";
fwrite($this->fp,$this->GetHeader());
return $this->fp;
}
function close()
{
if($this->state!="OPENED")
{
$this->error="Error : Please open the file.";
return false;
}
if($this->newRow)
{
fwrite($this->fp,"</tr>");
$this->newRow=false;
}
fwrite($this->fp,$this->GetFooter());
fclose($this->fp);
$this->state="CLOSED";
return ;
}
/* @Params : Void
* @return : Void
* This function write the header of Excel file.
*/
function GetHeader()
{
$header = <<<EOH
<html xmlns:o="urn:schemas-microsoft-com:office:office"
xmlns:x="urn:schemas-microsoft-com:office:excel"
xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=ProgId content=Excel.Sheet>
<!--[if gte mso 9]><xml>
<o:DocumentProperties>
<o:LastAuthor>Sriram</o:LastAuthor>
<o:LastSaved>2005-01-02T07:46:23Z</o:LastSaved>
<o:Version>10.2625</o:Version>
</o:DocumentProperties>
<o:OfficeDocumentSettings>
<o:DownloadComponents/>
</o:OfficeDocumentSettings>
</xml><![endif]-->
<style>
<!--table
{mso-displayed-decimal-separator:"\.";
mso-displayed-thousand-separator:"\,";}
@page
{margin:1.0in .75in 1.0in .75in;
mso-header-margin:.5in;
mso-footer-margin:.5in;}
tr
{mso-height-source:auto;}
col
{mso-width-source:auto;}
br
{mso-data-placement:same-cell;}
.style0
{mso-number-format:General;
text-align:general;
vertical-align:bottom;
white-space:nowrap;
mso-rotate:0;
mso-background-source:auto;
mso-pattern:auto;
color:windowtext;
font-size:10.0pt;
font-weight:400;
font-style:normal;
text-decoration:none;
font-family:Arial;
mso-generic-font-family:auto;
mso-font-charset:0;
border:none;
mso-protection:locked visible;
mso-style-name:Normal;
mso-style-id:0;}
td
{mso-style-parent:style0;
padding-top:1px;
padding-right:1px;
padding-left:1px;
mso-ignore:padding;
color:windowtext;
font-size:10.0pt;
font-weight:400;
font-style:normal;
text-decoration:none;
font-family:Arial;
mso-generic-font-family:auto;
mso-font-charset:0;
mso-number-format:General;
text-align:general;
vertical-align:bottom;
border:none;
mso-background-source:auto;
mso-pattern:auto;
mso-protection:locked visible;
white-space:nowrap;
mso-rotate:0;}
.xl24
{mso-style-parent:style0;
white-space:normal;}
-->
</style>
<!--[if gte mso 9]><xml>
<x:ExcelWorkbook>
<x:ExcelWorksheets>
<x:ExcelWorksheet>
<x:Name>Winery datas</x:Name>
<x:WorksheetOptions>
<x:Selected/>
<x:ProtectContents>False</x:ProtectContents>
<x:ProtectObjects>False</x:ProtectObjects>
<x:ProtectScenarios>False</x:ProtectScenarios>
</x:WorksheetOptions>
</x:ExcelWorksheet>
</x:ExcelWorksheets>
<x:WindowHeight>10005</x:WindowHeight>
<x:WindowWidth>10005</x:WindowWidth>
<x:WindowTopX>120</x:WindowTopX>
<x:WindowTopY>135</x:WindowTopY>
<x:ProtectStructure>False</x:ProtectStructure>
<x:ProtectWindows>False</x:ProtectWindows>
</x:ExcelWorkbook>
</xml><![endif]-->
</head>
<body link=blue vlink=purple>
<table x:str border=0 cellpadding=0 cellspacing=0 style='border-collapse: collapse;table-layout:fixed;'>
EOH;
return $header;
}
function GetFooter()
{
return "</table></body></html>";
}
/*
* @Params : $line_arr: An valid array
* @Params : $css: optional : An array of css properties
* @Return : Void
*/
function writeLine($line_arr, $css = NULL)
{
if($this->state!="OPENED")
{
$this->error="Error : Please open the file.";
return false;
}
if(!is_array($line_arr))
{
$this->error="Error : Argument is not valid. Supply an valid Array.";
return false;
}
if($css!=NULL)
{
$cssStr = $this->getCssString($css);
}
fwrite($this->fp,"<tr>");
foreach($line_arr as $col)
fwrite($this->fp,"<td class=xl24 width=64 $cssStr>$col</td>");
fwrite($this->fp,"</tr>");
}
function getCssString($css)
{
$returnVal = "style='";
foreach($css as $key => $val)
{
$returnVal.= $key.':'.$val.';';
}
$returnVal.= "'";
return $returnVal;
}
/*
* @Params : Void
* @Return : Void
*/
function writeRow()
{
if($this->state!="OPENED")
{
$this->error="Error : Please open the file.";
return false;
}
if($this->newRow==false)
fwrite($this->fp,"<tr>");
else
fwrite($this->fp,"</tr><tr>");
$this->newRow=true;
}
/*
* @Params : $value : Column Value
* @Params : $css: optional : An array of css properties
* @Return : Void
*/
function writeCol($value,$css = NULL)
{
if($this->state!="OPENED")
{
$this->error="Error : Please open the file.";
return false;
}
if($css!=NULL)
{
$cssStr = $this->getCssString($css);
}
fwrite($this->fp,"<td class=xl24 width=64 $cssStr>$value</td>");
}
}
?>
My PHP File:
<?php
include("excelwriter.inc.php");
$select_query=getenv("SELECTQUERY");
$strFileName = getenv("FILENAME");
$fp = fopen('/home/myprojectfilepath/public_html/dev/Export/Tests/output/'.basename($strFileName).'.txt', 'a+');
$fp = fopen('/home/myprojectfilepath/public_html/dev/Export/Tests/output/'.basename($strFileName).'.txt',"w");
fwrite($fp, '0');
fclose($fp);
$fp = fopen($strFileName,'a+');
$conn = mysql_connect('localhost','mysqlusername','mysqlpassword');
mysql_select_db('mydatabase',$conn);
$result = mysql_query($select_query, $conn );
$row = mysql_fetch_assoc( $result ); // Get the column names
$excel = new ExcelWriter($strFileName);
if($excel==false)
{
echo $excel->error;
die;
}
if ( $row )
{
$row_coulumn = array_keys($row);
$row_coulumn[0] = "Company Name";
............Assing Field Name in Excel Sheet........................
$row_coulumn[28] = "Title Group";
$excel->writeLine($row_coulumn, array('text-align'=>'center', 'color'=> 'black','border'=> '1px solid black','font-weight'=>'bold'));
}
while($row)
{
.............Insert value for each record.......................
}
$excel->close();
$fp = fopen('/home/myprojectpath/public_html/dev/Export/Tests/output/'.basename($strFileName).'.txt', 'a+');
$fp = fopen('/home/myprojectpath/public_html/dev/Export/Tests/output/'.basename($strFileName).'.txt',"w");
fwrite($fp, '1');
fclose($fp);
?>
