Export sqlite table using php - php

Question

Im just getting started with PHP, and I need to export a table from my sqlite database to a CSV or ideally XLS. I have found an example using mysql, but i cant convert it to work with sqlite.
Here is what i have so far:
<?php
$db = new PDO('sqlite:../ccm.sqlite');
$query = $db->query('SELECT * FROM Emails');
$export = sqlite_query ($query);
$fields = sqlite_num_fields ( $export );
for ( $i = 0; $i < $fields; $i++ ){
$header .= sqlite_field_name( $export , $i ) . "\t";
}
while( $row = sqlite_fetch_row( $export ) ){
//sqlite_fetch_row doesnt actually exist...
$line = '';
foreach( $row as $value ){
if ( ( !isset( $value ) ) || ( $value == "" ) ){
$value = "\t";
}else{
$value = str_replace( '"' , '""' , $value );
$value = '"' . $value . '"' . "\t";
}
$line .= $value;
}
$data .= trim( $line ) . "\n";
}
$data = str_replace( "\r" , "" , $data );
if ( $data == "" ){
$data = "\n(0) Records Found!\n";
}
header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename=emails.xls");
header("Pragma: no-cache");
header("Expires: 0");
print "$header\n$data";
?>
Can anyone help me out with this?
or if there is a simpler way that would be great.
Cheers

Answer 1

You are mixing PDO methods with sqlite_* functions; try using one or the other:
$db = new PDO("sqlite:../ccm.sqlite");
$query = $db->query("select * from emails");
$first_row = true;
while ($row = $query->fetch(PDO::FETCH_ASSOC))
{
if ($first_row)
{
// I'm not sure how to get the field names using a PDO method but
// we can use the first row's (or any row's) key values as these
// are the field names.
$first_row = false;
$number_of_fields = count($row);
$field_names = array_keys($row);
$first_field_name = $field_names[0];
}
// do stuff here with the row
print_r($row);
}
or
$db = sqlite_open("../cmm.sqlite");
$query = sqlite_query($db, "select * from emails");
$number_of_fields = sqlite_num_fields($query);
$first_field_name = sqlite_field_name($query, 0);
while ($row = sqlite_fetch_array($query))
{
// do stuff here with the row.
print_r($row);
}
I'm not 100% sure but I think PDO works with sqlite3 databases and sqlite_* functions works with sqlite2 databases.

Answer 2

If I need to quickly get data out of a sqlite3 database as CSV files, I use the sqlite3 CLI:
$ sqlite3 ccm.sqlite
sqlite> .mode csv
sqlite> .output emails.csv
sqlite> .headers on
sqlite> select * from emails
sqlite> .output stdout
sqlite> .quit
$ cat emails.csv
This starts the sqlite3 CLI opening the ccm.sqlite database, sets the output mode to csv (the format of select statements), sets output to the file named emails.csv, turns select column headers on (optional), selects all the data in the emails table, sets output to standard out (closing the emails.csv file), quits the CLI and checks the output by sending it to standard out.
There are other formats you can output, type .help at the sqlite3 CLI prompt:
.mode MODE ?TABLE? Set output mode where MODE is one of:
csv Comma-separated values
column Left-aligned columns. (See .width)
html HTML <table> code
insert SQL insert statements for TABLE
line One value per line
list Values delimited by .separator string
tabs Tab-separated values
tcl TCL list elements

Answer 3

I've improved upon Stacey's answer, and thought I'll share it here.
I've added headers to make the browser download the output as a CSV file.
<?
// Set headers to make the browser download the results as a csv file
header("Content-type: text/csv");
header("Content-Disposition: attachment; filename=filename.csv");
header("Pragma: no-cache");
header("Expires: 0");
// Connect to DB
$conn = new PDO('sqlite:db_name.db');
// Query
$query = $conn->query("SELECT * FROM some_table");
// Fetch the first row
$row = $query->fetch(PDO::FETCH_ASSOC);
// If no results are found, echo a message and stop
if ($row == false){
echo "No results";
exit;
}
// Print the titles using the first line
print_titles($row);
// Iterate over the results and print each one in a line
while ($row != false) {
// Print the line
echo implode(array_values($row), ",") . "\n";
// Fetch the next line
$row = $query->fetch(PDO::FETCH_ASSOC);
}
// Prints the column names
function print_titles($row){
echo implode(array_keys($row), ",") . "\n";
}

Answer 4

If you need to send a CSV file directly to the browser, without writing in an external file, you can open the output and use fputcsv on it.
<?php
$out = fopen('php://output', 'w');
// print column header
fputcsv($out, array_keys($row)));
//or print content directly
fputcsv($out, array_values($row)));
fclose($out);
?>