billy21
asked on
PHP code is dislaying as literal string at runtime
Please see the attached PHP code snipet.
Scroll down to the bottom to the section labelled //THIS IS WHERE THE TROUBLE BEGINS
I am attempting to build an xml string.
Look at this line...
$xml = '<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>'."\n";
When I run this, everything after the last single quote (ie the ."\n"; and all the code after that) displays literally displays on screen in my browser.
When I remove this line it still happens but starts from the next line.
Anyone happen to know why this would be happening?
Scroll down to the bottom to the section labelled //THIS IS WHERE THE TROUBLE BEGINS
I am attempting to build an xml string.
Look at this line...
$xml = '<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>'."\n";
When I run this, everything after the last single quote (ie the ."\n"; and all the code after that) displays literally displays on screen in my browser.
When I remove this line it still happens but starts from the next line.
Anyone happen to know why this would be happening?
<?php
// Database connection settings
define("PG_DB" , "test");
define("PG_HOST", "localhost");
define("PG_USER", "postgres");
define("PG_PORT", "5432");
define("TABLE", "ways");
$counter = $pathlength = 0;
// Retrieve start point
$start = split(' ',$_REQUEST['startpoint']);
$startPoint = array($start[0], $start[1]);
// Retrieve end point
$end = split(' ',$_REQUEST['finalpoint']);
$endPoint = array($end[0], $end[1]);
// Find the nearest edge
$startEdge = findNearestEdge($startPoint);
$endEdge = findNearestEdge($endPoint);
// FUNCTION findNearestEdge
function findNearestEdge($lonlat) {
// Connect to database
$con = pg_connect("dbname=".PG_DB." host=".PG_HOST." password=".PG_PASS." user=".PG_USER);
$sql = "SELECT gid, source, target, the_geom,
distance(the_geom, GeometryFromText(
'POINT(".$lonlat[0]." ".$lonlat[1].")', 900913)) AS dist
FROM ".TABLE."
WHERE the_geom && setsrid(
'BOX3D(".($lonlat[0]-200)."
".($lonlat[1]-200).",
".($lonlat[0]+200)."
".($lonlat[1]+200).")'::box3d, 900913)
ORDER BY dist LIMIT 1";
$query = pg_query($con,$sql);
$edge['gid'] = pg_fetch_result($query, 0, 0);
$edge['source'] = pg_fetch_result($query, 0, 1);
$edge['target'] = pg_fetch_result($query, 0, 2);
$edge['the_geom'] = pg_fetch_result($query, 0, 3);
// Close database connection
pg_close($con);
return $edge;
}
// Select the routing algorithm
switch($_REQUEST['method']) {
case 'SPD' : // Shortest Path Dijkstra
$sql = "SELECT rt.gid, AsText(rt.the_geom) AS wkt,
length(rt.the_geom) AS length, ".TABLE.".id
FROM ".TABLE.",
(SELECT gid, the_geom
FROM dijkstra_sp_delta(
'".TABLE."',
".$startEdge['source'].",
".$endEdge['target'].",
3000)
) as rt
WHERE ".TABLE.".gid=rt.gid;";
break;
case 'SPA' : // Shortest Path A*
$sql = "SELECT rt.gid, AsText(rt.the_geom) AS wkt,
length(rt.the_geom) AS length, ".TABLE.".id
FROM ".TABLE.",
(SELECT gid, the_geom
FROM astar_sp_delta(
'".TABLE."',
".$startEdge['source'].",
".$endEdge['target'].",
3000)
) as rt
WHERE ".TABLE.".gid=rt.gid;";
break;
case 'SPS' : // Shortest Path Shooting*
$sql = "SELECT rt.gid, AsText(rt.the_geom) AS wkt,
length(rt.the_geom) AS length, ".TABLE.".id
FROM ".TABLE.",
(SELECT gid, the_geom
FROM shootingstar_sp(
'".TABLE."',
".$startEdge['gid'].",
".$endEdge['gid'].",
3000, 'length', false, false)
) as rt
WHERE ".TABLE.".gid=rt.gid;";
break;
} // close switch
// echo $sql;
// Database connection and query
$dbcon = pg_connect("dbname=".PG_DB." host=".PG_HOST." password=".PG_PASS." user=".PG_USER);
$query = pg_query($dbcon,$sql);
// Return route as XML
//THIS IS WHERE THE TROUBLE BEGINS...
$xml = '<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>'."\n";
$xml .= "<route>\n";
// Add edges to XML file
while($edge=pg_fetch_assoc($query)) {
$pathlength += $edge['length'];
$xml .= "\t<edge id='".++$counter."'>\n";
$xml .= "\t\t<id>".$edge['id']."</id>\n";
$xml .= "\t\t<wkt>".$edge['wkt']."</wkt>\n";
$xml .= "\t\t<length>".round(($pathlength/1000),3)."</length>\n";
$xml .= "\t</edge>\n";
}
$xml .= "</route>\n";
// Close database connection
pg_close($dbcon);
// Return routing result
header('Content-type: text/xml',true);
echo $xml;
?>
ASKER CERTIFIED SOLUTION
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>>When I remove this line it still happens but starts from the next line.
are you saying that the "literal" output is the PHP code?
are you saying that the "literal" output is the PHP code?
ASKER
Just as a test I tried removing the ? characters from the xml header tag. I also removed the xml building lines underneath it just for clarity.
When I run the page this displays in my browser...
'."\n"; // Close database connection pg_close($dbcon); // Return routing result header('Content-type: text/xml',true); echo $xml; ?>
Note: The only ? characters in the system now are for the opening and closing php tag. So what is displaying at the end is the closing php tag.
ASKER
"are you saying that the "literal" output is the PHP code?"
Yes and even commented out sections are displayed. This is the full text that I get when I run the original code posted...
'."\n"; $xml .= "\n"; // Add edges to XML file while($edge=pg_fetch_assoc
Yes and even commented out sections are displayed. This is the full text that I get when I run the original code posted...
'."\n"; $xml .= "\n"; // Add edges to XML file while($edge=pg_fetch_assoc
ASKER
The attached code snipet is what I'm currently working with. And the text below is what is displayed in the browser when I run it. Maybe I've not implemented your solution correctly?
'."\n"; $xml .= "\n"; // Add edges to XML file while($edge=pg_fetch_assoc
'."\n"; $xml .= "\n"; // Add edges to XML file while($edge=pg_fetch_assoc
<?php
ini_set('short_open_tag','Off');
// Database connection settings
define("PG_DB" , "routing");
define("PG_HOST", "localhost");
define("PG_PASS", "postgres");
define("PG_USER", "postgres");
define("PG_PORT", "5432");
define("TABLE", "ways");
$counter = $pathlength = 0;
// Retrieve start point
$start = split(' ',$_REQUEST['startpoint']);
$startPoint = array($start[0], $start[1]);
// Retrieve end point
$end = split(' ',$_REQUEST['finalpoint']);
$endPoint = array($end[0], $end[1]);
// Find the nearest edge
$startEdge = findNearestEdge($startPoint);
$endEdge = findNearestEdge($endPoint);
// FUNCTION findNearestEdge
function findNearestEdge($lonlat) {
// Connect to database
$con = pg_connect("dbname=".PG_DB." host=".PG_HOST." password=".PG_PASS." user=".PG_USER);
$sql = "SELECT gid, source, target, the_geom,
distance(the_geom, GeometryFromText(
'POINT(".$lonlat[0]." ".$lonlat[1].")', 900913)) AS dist
FROM ".TABLE."
WHERE the_geom && setsrid(
'BOX3D(".($lonlat[0]-200)."
".($lonlat[1]-200).",
".($lonlat[0]+200)."
".($lonlat[1]+200).")'::box3d, 900913)
ORDER BY dist LIMIT 1";
$query = pg_query($con,$sql);
$edge['gid'] = pg_fetch_result($query, 0, 0);
$edge['source'] = pg_fetch_result($query, 0, 1);
$edge['target'] = pg_fetch_result($query, 0, 2);
$edge['the_geom'] = pg_fetch_result($query, 0, 3);
// Close database connection
pg_close($con);
return $edge;
}
// Select the routing algorithm
switch($_REQUEST['method']) {
case 'SPD' : // Shortest Path Dijkstra
$sql = "SELECT rt.gid, AsText(rt.the_geom) AS wkt,
length(rt.the_geom) AS length, ".TABLE.".id
FROM ".TABLE.",
(SELECT gid, the_geom
FROM dijkstra_sp_delta(
'".TABLE."',
".$startEdge['source'].",
".$endEdge['target'].",
3000)
) as rt
WHERE ".TABLE.".gid=rt.gid;";
break;
case 'SPA' : // Shortest Path A*
$sql = "SELECT rt.gid, AsText(rt.the_geom) AS wkt,
length(rt.the_geom) AS length, ".TABLE.".id
FROM ".TABLE.",
(SELECT gid, the_geom
FROM astar_sp_delta(
'".TABLE."',
".$startEdge['source'].",
".$endEdge['target'].",
3000)
) as rt
WHERE ".TABLE.".gid=rt.gid;";
break;
case 'SPS' : // Shortest Path Shooting*
$sql = "SELECT rt.gid, AsText(rt.the_geom) AS wkt,
length(rt.the_geom) AS length, ".TABLE.".id
FROM ".TABLE.",
(SELECT gid, the_geom
FROM shootingstar_sp(
'".TABLE."',
".$startEdge['gid'].",
".$endEdge['gid'].",
3000, 'length', false, false)
) as rt
WHERE ".TABLE.".gid=rt.gid;";
break;
} // close switch
// echo $sql;
// Database connection and query
$dbcon = pg_connect("dbname=".PG_DB." host=".PG_HOST." password=".PG_PASS." user=".PG_USER);
$query = pg_query($dbcon,$sql);
// Return route as XML
$xml = '<' . '?xml version="1.0" encoding="UTF-8" standalone="yes" ?'.'>'."\n";
$xml .= "<route>\n";
// Add edges to XML file
while($edge=pg_fetch_assoc($query)) {
$pathlength += $edge['length'];
$xml .= "\t<edge id='".++$counter."'>\n";
$xml .= "\t\t<id>".$edge['id']."</id>\n";
$xml .= "\t\t<wkt>".$edge['wkt']."</wkt>\n";
$xml .= "\t\t<length>".round(($pathlength/1000),3)."</length>\n";
$xml .= "\t</edge>\n";
}
$xml .= "</route>\n";
// Close database connection
pg_close($dbcon);
// Return routing result
header('Content-type: text/xml',true);
echo $xml;
?>
strange. Try:
<?php
ini_set('short_open_tag','Off');
// Database connection settings
define("PG_DB" , "routing");
define("PG_HOST", "localhost");
define("PG_PASS", "postgres");
define("PG_USER", "postgres");
define("PG_PORT", "5432");
define("TABLE", "ways");
$counter = $pathlength = 0;
// Retrieve start point
$start = split(' ',$_REQUEST['startpoint']);
$startPoint = array($start[0], $start[1]);
// Retrieve end point
$end = split(' ',$_REQUEST['finalpoint']);
$endPoint = array($end[0], $end[1]);
// Find the nearest edge
$startEdge = findNearestEdge($startPoint);
$endEdge = findNearestEdge($endPoint);
// FUNCTION findNearestEdge
function findNearestEdge($lonlat) {
// Connect to database
$con = pg_connect("dbname=".PG_DB." host=".PG_HOST." password=".PG_PASS." user=".PG_USER);
$sql = "SELECT gid, source, target, the_geom,
distance(the_geom, GeometryFromText(
'POINT(".$lonlat[0]." ".$lonlat[1].")', 900913)) AS dist
FROM ".TABLE."
WHERE the_geom && setsrid(
'BOX3D(".($lonlat[0]-200)."
".($lonlat[1]-200).",
".($lonlat[0]+200)."
".($lonlat[1]+200).")'::box3d, 900913)
ORDER BY dist LIMIT 1";
$query = pg_query($con,$sql);
$edge['gid'] = pg_fetch_result($query, 0, 0);
$edge['source'] = pg_fetch_result($query, 0, 1);
$edge['target'] = pg_fetch_result($query, 0, 2);
$edge['the_geom'] = pg_fetch_result($query, 0, 3);
// Close database connection
pg_close($con);
return $edge;
}
// Select the routing algorithm
switch($_REQUEST['method']) {
case 'SPD' : // Shortest Path Dijkstra
$sql = "SELECT rt.gid, AsText(rt.the_geom) AS wkt,
length(rt.the_geom) AS length, ".TABLE.".id
FROM ".TABLE.",
(SELECT gid, the_geom
FROM dijkstra_sp_delta(
'".TABLE."',
".$startEdge['source'].",
".$endEdge['target'].",
3000)
) as rt
WHERE ".TABLE.".gid=rt.gid;";
break;
case 'SPA' : // Shortest Path A*
$sql = "SELECT rt.gid, AsText(rt.the_geom) AS wkt,
length(rt.the_geom) AS length, ".TABLE.".id
FROM ".TABLE.",
(SELECT gid, the_geom
FROM astar_sp_delta(
'".TABLE."',
".$startEdge['source'].",
".$endEdge['target'].",
3000)
) as rt
WHERE ".TABLE.".gid=rt.gid;";
break;
case 'SPS' : // Shortest Path Shooting*
$sql = "SELECT rt.gid, AsText(rt.the_geom) AS wkt,
length(rt.the_geom) AS length, ".TABLE.".id
FROM ".TABLE.",
(SELECT gid, the_geom
FROM shootingstar_sp(
'".TABLE."',
".$startEdge['gid'].",
".$endEdge['gid'].",
3000, 'length', false, false)
) as rt
WHERE ".TABLE.".gid=rt.gid;";
break;
} // close switch
// echo $sql;
// Database connection and query
$dbcon = pg_connect("dbname=".PG_DB." host=".PG_HOST." password=".PG_PASS." user=".PG_USER);
$query = pg_query($dbcon,$sql);
// Return route as XML
$xml = "<route>\n";
// Add edges to XML file
while($edge=pg_fetch_assoc($query)) {
$pathlength += $edge['length'];
$xml .= "\t<edge id='".++$counter."'>\n";
$xml .= "\t\t<id>".$edge['id']."</id>\n";
$xml .= "\t\t<wkt>".$edge['wkt']."</wkt>\n";
$xml .= "\t\t<length>".round(($pathlength/1000),3)."</length>\n";
$xml .= "\t</edge>\n";
}
$xml .= "</route>\n";
// Close database connection
pg_close($dbcon);
// Return routing result
header('Content-type: text/xml',true);
echo '<' . '?xml version="1.0" encoding="UTF-8" standalone="yes" ?'.'>'."\n".$xml;
exit;
?>
ASKER
That results in this...
\n"; // Add edges to XML file while($edge=pg_fetch_assoc
\n"; // Add edges to XML file while($edge=pg_fetch_assoc
on the following lines:
$dbcon = pg_connect("dbname=".PG_DB
$query = pg_query($dbcon,$sql);
how do you know the queries succeeded?
Try:
$dbcon = pg_connect("dbname=".PG_DB
$query = pg_query($dbcon,$sql) or die("Error executing query");
$dbcon = pg_connect("dbname=".PG_DB
$query = pg_query($dbcon,$sql);
how do you know the queries succeeded?
Try:
$dbcon = pg_connect("dbname=".PG_DB
$query = pg_query($dbcon,$sql) or die("Error executing query");
ASKER
Hi Hielo,
The problem turned out to be an issue with my web server setup. It wasn't recognising the php code as anything other than text and thus was displaying it to screen.
Had I not had this issue it still would not have worked due to the issues you have highlighted. Thanks for your help on this and sorry for the delay it just took some time for me to figure out the web server issues.
The problem turned out to be an issue with my web server setup. It wasn't recognising the php code as anything other than text and thus was displaying it to screen.
Had I not had this issue it still would not have worked due to the issues you have highlighted. Thanks for your help on this and sorry for the delay it just took some time for me to figure out the web server issues.
ASKER