how to use php retrieve data from postgresql and showing in html - php

Question

I was trying to retrieve data from PostgreSQL database, In PHP.
Retrieving the data is fine but it does not work when it is linked with HTML.
When I click on find button in HTML interface, it did not really retrieve data from PostgrSQL.
Can anybody help?
PHP
$host = "host=sv4gis";
$dbname = "dbname=survey";
$credentials = "user=sde password=dfd54f";
$objectid = "";
$jobno = "";
$unit = "";
$coordinate = "";
$name = "";
$northing = "";
$easting = "";
$elev = "";
$db = pg_connect( "$host $dbname $credentials" );
if(!$db){
echo "Error : Unable to open database\n";
} else {
echo "Opened database successfully\n";
}
function getPosts() {
$posts = array();
$posts[0] = $_POST['objectid'];
$posts[1] = $_POST['jobno'];
$posts[2] = $_POST['unit'];
$posts[3] = $_POST['coordinate'];
$posts[4] = $_POST['name'];
$posts[5] = $_POST['northing'];
$posts[6] = $_POST['easting'];
$posts[7] = $_POST['elev'];
return $posts;
}
// Selection Operation
if (isset($_POST['search'])) {
$data = getPosts();
$sql = "SELECT * FROM monu_from_Lst WHERE OBJECTID = $data[0]";
$ret = pg_query($db, $sql);
if($ret) {
if(pg_num_rows($ret)) {
while($row = pg_fetch_array($ret)) {
echo $objectid = $row['objectid'];
echo $jobno = $row['jobno'];
echo $unit = $row['unit'];
echo $coordinate = $row['coordinate'];
echo $name = $row['name'];
echo $northing = $row['northing'];
echo $easting = $row['easting'];
echo $elev = $row['elev'];
}
echo "Operation done successfully\n";
// pg_close($db);
}else{
echo 'No Data For This Id';
}
} else {
echo 'Result Error';
}
}
HTML
<form action="php_insert_update_delete_search.php" method="post">
<input type="number" name="objectid" placeholder="OBJECTID" value="<?php echo $objectid;?>">
<input type="text" name="jobno" placeholder="JOB#" value="<?php echo $jobno;?>">
<input type="text" name="unit" placeholder="UNIT" value="<?php echo $unit;?>">
<input type="text" name="coordinate" placeholder="COORDINATE" value="<?php echo $coordinate;?>">
<input type="text" name="name" placeholder="NAME" value="<?php echo $name;?>">
<input type="number" name="northing" placeholder="NORTHING" value="<?php echo $northing;?>">
<input type="number" name="northing" placeholder="NORTHING" value="<?php echo $northing;?>">
<input type="number" name="easting" placeholder="EASTING" value="<?php echo $easting;?>">
<input type="number" name="elev" placeholder="ElEVATION" value="<?php echo $elev;?>">
<div>
<input type="submit" name="search" value="Find">
</div>
</form>

Answer 1

Your code seems to be fine. The problem might be with
<form action="php_insert_update_delete_search.php" method="post">
If you are posting the file to itself try using
<form action="<?php echo $_SERVER["PHP_SELF"];?>" method="post">
Make sure your query runs successfully. if your query does not run successfully
try following
$sql = "SELECT * FROM \"monu_from_Lst\" WHERE objectid= $data[0]";
I have working code as following
<?php
$host = "host=localhost"; // use your hostname
$dbname = "dbname=blogsitedb"; // use your dbname
$credentials = "user=postgres password=admin"; // use your credentials
$objectid = "";
$jobno = "";
$unit = "";
$coordinate = "";
$name = "";
$northing = "";
$easting = "";
$elev = "";
$db = pg_connect("$host $dbname $credentials");
if(!$db)
{
echo "Error : Unable to open database\n";
}
else
{
echo "Opened database successfully\n";
}
function getPosts()
{
$posts = array();
$posts[0] = $_POST['objectid'];
$posts[1] = $_POST['jobno'];
$posts[2] = $_POST['unit'];
/*
$posts[3] = $_POST['coordinate'];
$posts[4] = $_POST['name'];
$posts[5] = $_POST['northing'];
$posts[6] = $_POST['easting'];
$posts[7] = $_POST['elev'];
*/
return $posts;
}
// Selection Operation
if(isset($_POST['search']))
{
$data = getPosts();
$sql = "SELECT * FROM \"monu_from_Lst\" WHERE objectid= $data[0]";
$ret = pg_query($db, $sql);
if($ret)
{
if(pg_num_rows($ret))
{
while($row = pg_fetch_array($ret))
{
echo $objectid = $row['objectid'];
echo $jobno = $row['jobno'];
echo $unit = $row['unit'];
/*echo $coordinate = $row['coordinate'];
echo $name = $row['name'];
echo $northing = $row['northing'];
echo $easting = $row['easting'];
echo $elev = $row['elev'];*/
}
echo "Operation done successfully\n";
// pg_close($db);
}
else
{
echo 'No Data For This Id';
}
}
else
{
echo 'Result Error';
}
}
?>
<!DOCTYPE Html>
<html>
<head>
<title>PHP INSERT UPDATE DELETE SEARCH</title>
</head>
<body>
<form action="<?php echo $_SERVER["PHP_SELF"];?>" method="post">
<input type="number" name="objectid" placeholder="OBJECTID" value="<?php echo $objectid;?>"><br><br>
<input type="text" name="jobno" placeholder="JOB#" value="<?php echo $jobno;?>"><br><br>
<input type="text" name="unit" placeholder="UNIT" value="<?php echo $unit;?>"><br><br>
<input type="text" name="coordinate" placeholder="COORDINATE" value="<?php echo $coordinate;?>"><br><br>
<input type="text" name="name" placeholder="NAME" value="<?php echo $name;?>"><br><br>
<input type="number" name="northing" placeholder="NORTHING" value="<?php echo $northing;?>"><br><br>
<input type="number" name="northing" placeholder="NORTHING" value="<?php echo $northing;?>"><br><br>
<input type="number" name="easting" placeholder="EASTING" value="<?php echo $easting;?>"><br><br>
<input type="number" name="elev" placeholder="ElEVATION" value="<?php echo $elev;?>"><br><br>
<div>
<!-- Input For Find Values With The given objectid -->
<input type="submit" name="search" value="Find">
</div>
</form>
</body>
</html>