php教程 如何连接MS SQL Server 数据库教程
下面是连接到MSSQL服务器数据库代码。
<?php
$myServer = "localhost";
$myUser = "your_name";
$myPass = "your_password";
$myDB = "examples";
//connection to the database
$dbhandle = mssql_connect($myServer, $myUser, $myPass)
or die("Couldn't connect to SQL Server on $myServer");
//select a database to work with
$selected = mssql_select_db($myDB, $dbhandle)
or die("Couldn't open database $myDB");
//declare the SQL statement that will query the database
$query = "SELECT id, name, year ";
$query .= "FROM cars ";
$query .= "WHERE name='BMW'";
//execute the SQL query and return records
$result = mssql_query($query);
$numRows = mssql_num_rows($result);
echo "<h1>" . $numRows . " Row" . ($numRows == 1 ? "" : "s") . " Returned
</h1>";
//display the results
while($row = mssql_fetch_array($result))
{
echo "<li>" . $row["id"] . $row["name"] . $row["year"] . "</li>";
}
//close the connection
mssql_close($dbhandle);
?>
DSN的主张'数据源名称'。这是一个简单的方法来分配，容易rememberable有用的数据
源的名称可能不局限于单独的数据库。如果您不知道如何建立一个系统DSN阅读我们的
教程如何建立一个系统DSN。
在下面的例子，我们将告诉你如何以一MSSQL服务器数据库DSN所谓'连接
examples.mdb'和检索所有的记录表中的'车'。
<?php
//connect to a DSN "myDSN"
$conn = odbc_connect('myDSN','','');
if ($conn)
{
//the SQL statement that will query the database
$query = "select * from cars";
//perform the query
$result=odbc_exec($conn, $query);
echo "<table border="1"><tr>";
//print field name
$colName = odbc_num_fields($result);
for ($j=1; $j<= $colName; $j++)
{
echo "<th>";
echo odbc_field_name ($result, $j );
echo "</th>";
}
//fetch tha data from the database
while(odbc_fetch_row($result))
{
echo "<tr>";
for($i=1;$i<=odbc_num_fields($result);$i++)
{
echo "<td>";
echo odbc_result($result,$i);
echo "</td>";
}
echo "</tr>";
}
echo "</td> </tr>";
echo "</table >";
//close the connection
odbc_close ($conn);
}
else echo "odbc not connected";
?>
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php 如何把pdf文件转换成txt文本文件
文档格式（PDF）是一种文件格式创建的文件交换。每个PDF文件封装了一个固定布局
的2D文件的完整说明（和，与Acrobat 3D软件，嵌入式3D文件），其中包括文字，字
体，图像和二维矢量图形，撰写文件。
function pdf2text($filename) {
// Read the data from pdf file
$infile = @file_get_contents($filename, FILE_BINARY);
if (empty($infile))
return "";
// Get all text data.
$transformations = array();
$texts = array();
// Get the list of all objects.
preg_match_all("#obj(.*)endobj#ismU", $infile, $objects);
$objects = @$objects[1];
// Select objects with streams.
for ($i = 0; $i < count($objects); $i++) {
$currentObject = $objects[$i];
// Check if an object includes data stream.
if (preg_match("#stream(.*)endstream#ismU", $currentObject,
$stream)) {
$stream = ltrim($stream[1]);
// Check object parameters and look for text data.
$options = getObjectOptions($currentObject);
if (!(empty($options["Length1"]) && empty($options["Type"]) &&
empty($options["Subtype"])))
continue;
// So, we have text data. Decode it.
$data = getDecodedStream($stream, $options);
if (strlen($data)) {
if (preg_match_all("#BT(.*)ET#ismU", $data,
$textContainers)) {
$textContainers = @$textContainers[1];
getDirtyTexts($texts, $textContainers);
} else
getCharTransformations($transformations, $data);
}
}
}
// Analyze text blocks taking into account character transformations
and return results.
return getTextUsingTransformations($texts, $transformations);
}