From: Saturnino (niunclau(EN)yahoo.es)
Date: Tue Oct 26 2004 - 17:36:13 CEST
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/var/www/vhost/cantamos.net/home/html/curva/show_poll.php on line 166
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Esto es lo que me sale, deberia salir un grafico con tres resultados y me
sale este error primero y luego el grafico pues saca cosas estrañas.
A continuacion les pongo el codigo haber si pueden ayudarme y les indico la
linea que me da error, cualquier ayuda me vendra bien.
Header('Content-type: image/png'); // ESTA ES LA LINEA 166 LA QUE ME
DA EL ERROR PERO NO SE POR QUE
ImagePng($im);
// A CONTINUACION LES MUESTRO TODO EL CODIGO
<title>holar2</title><?php
# FileName="Connection_php_mysql.htm"
# Type="MYSQL"
# HTTP="true"
/*******************************************
Database query to get poll info
*******************************************/
// get vote from form
$vote=$HTTP_POST_VARS['vote'];
// log in to database
if (!$db_conn = (EN)mysql_connect("servidor","basededatos","clave"))
{
echo 'No he podido conectar con la base de datos reiiidb<br />';
exit;
};
(EN)mysql_select_db("basededatos");
if (!empty($vote)) // if they filled the form out, add their vote
{
$vote = addslashes($vote);
$query = "update poll_results
set num_votes = num_votes + 1
where candidate = '$vote'";
if(!($result = (EN)mysql_query($query, $db_conn)))
{
echo '<br />';
exit;
}
};
// get current results of poll, regardless of whether they voted
$query = "select * from poll_results";
if(!($result = (EN)mysql_query($query, $db_conn)))
{
echo 'No hemos encotrado la base de datos vale tio000000000 db<br />';
exit;
}
$num_candidates = mysql_num_rows($result);
// calculate total number of votes so far
$total_votes=0;
while ($row = mysql_fetch_object ($result))
{
$total_votes += $row->num_votes;
}
mysql_data_seek($result, 0); // reset result pointer
/*******************************************
Initial calculations for graph
*******************************************/
// set up constants
putenv("GDFONTPATH = $ARIAL.TTF");
$width=500; // width of image in pixels - this will fit in 640x480
$left_margin = 50; // space to leave on left of image
$right_margin= 50; // ditto right
$bar_height = 40;
$bar_spacing = $bar_height/2;
$font = "ARIAL.TTF";
$title_size= 16; // point
$main_size= 12; // point
$small_size= 12; // point
$text_indent = 10; // position for text labels on left
// set up initial point to draw from
$x = $left_margin + 60; // place to draw baseline of the graph
$y = 50; // ditto
$bar_unit = ($width-($x+$right_margin)) / 100; // one "point" on the graph
// calculate height of graph - bars plus gaps plus some margin
$height = $num_candidates * ($bar_height + $bar_spacing) + 50;
/*******************************************
Set up base image
*******************************************/
// create a blank canvas
$im = imagecreate($width,$height);
// Allocate colors
$white=ImageColorAllocate($im,255,255,255);
$blue=ImageColorAllocate($im,0,64,128);
$black=ImageColorAllocate($im,0,0,0);
$pink = ImageColorAllocate($im,255,78,243);
$text_color = $black;
$percent_color = $black;
$bg_color = $white;
$line_color = $black;
$bar_color = $blue;
$number_color = $pink;
// Create "canvas" to draw on
ImageFilledRectangle($im,0,0,$width,$height,$bg_color);
// Draw outline around canvas
ImageRectangle($im,0,0,$width-1,$height-1,$line_color);
// Add title
$title = "Poll Results";
$title_dimensions = ImageTTFBBox($title_size,0,
$font,
$title);
$title_length = $title_dimensions[2] - $title_dimensions[0];
$title_height = abs($title_dimensions[7] - $title_dimensions[1]);
$title_above_line = abs($title_dimensions[7]);
$title_x = ($width-$title_length)/2; // center it in x
$title_y = ($y - $title_height)/2 + $title_above_line; // center in y gap
ImageTTFText($im, $title_size, 0, $title_x, $title_y,
$text_color,
$font,
$title);
// Draw a base line from a little above first bar location
// to a little below last
ImageLine($im, $x, $y-5, $x, $height-15, $line_color);
/*******************************************
Draw data into graph
*******************************************/
// Get each line of db data and draw corresponding bars
while ($row = mysql_fetch_object ($result))
{
if ($total_votes > 0)
$percent = intval(round(($row->num_votes/$total_votes)*100));
else
$percent = 0;
// display percent for this value
ImageTTFText($im, $main_size, 0, $width-30, $y+($bar_height/2),
$percent_color, $font, $percent.'%');
if ($total_votes > 0)
$right_value = intval(round(($row->num_votes/$total_votes)*100));
else
$right_value = 0;
// length of bar for this value
$bar_length = $x + ($right_value * $bar_unit);
// draw bar for this value
ImageFilledRectangle($im, $x, $y-2, $bar_length, $y+$bar_height,
$bar_color);
// draw title for this value
ImageTTFText($im, $main_size, 0, $text_indent, $y+($bar_height/2),
$text_color, $font, "$row->candidate");
// draw outline showing 100%
ImageRectangle($im, $bar_length+1, $y-2,
($x+(100*$bar_unit)), $y+$bar_height, $line_color);
// display numbers
ImageTTFText($im, $small_size, 0, $x+(100*$bar_unit)-50,
$y+($bar_height/2),
$number_color, $font, $row->num_votes.'/'.$total_votes);
// move down to next bar
$y=$y+($bar_height+$bar_spacing);
}
/*******************************************
Display image
*******************************************/
Header('Content-type: image/png'); // ESTA ES LA LINEA 166 LA QUE ME
DA EL ERROR PERO NO SE POR QUE
ImagePng($im);
/*******************************************
Clean up
*******************************************/
ImageDestroy($im);
?>
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This archive was generated by hypermail 2.1.7 : Fri Nov 12 2004 - 20:21:31 CET