Azi sarbatorim 1 zi de nastere.
Grafuri in php
Data publicarii: 05-05-2011 -
Copyright © Croce Alexandru
Pentru nevoi personale am facut un script php de generat grafice dupa puncte de coordonate. Poate mai are cineva nevoie de asa ceva asa ca-l postez aici:
COD:
<?php
$puncte = array(
1 => '0,0',
2 => '3,2',
3 => '5,7',
4 => '8,4'
);
$linii = 10;
$coloane = 20;
header ("Content-type: image/jpeg");
$height = 250;
$width = 600;
$img = imagecreate ($width,$height);
$fond = imagecolorallocate ($img,211,211,211);
$col = imagecolorallocate ($img,0,0,0);
$linecol = imagecolorallocate ($img,82,10,26);
$textcol = imagecolorallocate ($img,0,34,102);
imageline ($img,0,$width,0,0,$col);
imageline ($img,$width,0,0,0,$col);
imageline ($img,0,$height-1,$width,$height-1,$col);
imageline ($img,$width-1,0,$width-1,$height,$col);
//forsyn
$ay=0;
for($i=0; $i<=$linii; $i++){
$ay=$ay+$height/$linii;
imageline ($img,0,$ay,$width,$ay,$col);
}
//forsyn
//forsxn
$ay=0;
for($i=0; $i<=$coloane; $i++){
$ay=$ay+$width/$coloane;
imageline ($img,$ay,0,$ay,$height,$col);
}
//forsxn
for($i=1; $i<=count($puncte); $i++){
$exp = explode(',', $puncte[$i]);
$x[$i] = $exp[0];
$y[$i] = $exp[1];
}
for($i=1; $i<=count($x); $i++){
$ax[$i] = $x[$i]*$width/$coloane;
$bx[$i] = $y[$i]*$height/$linii;
$bx[$i] = $height-$bx[$i];
imagestring ($img,5,$ax[$i],$bx[$i]+1,'('.$x[$i].';'.$y[$i].')',$textcol);
}
for($i=1; $i<count($bx); $i++){
imageline ($img,$ax[$i],$bx[$i],$ax[$i+1],$bx[$i+1],$linecol);
}
imagejpeg ($img, '', 100);
?>
Utilizare:
- In array-ul $puncte, exact la inceput sunt date punctele de coordonate x si y. De acolo puteti adauga,sterge,modifica puncte/coordonate.
- Grid-urile verticale si orizontale sunt intre //forsxn sau //forsyn pentru cei care nu vor sa le vada.
- Inaltimea si latimea 100% modificabile fara sa denatureze valorile graficului.
- $linii, $coloane = numarul de linii si de coloane care sa delimiteze graficul (schimbati valorile si veti intelege)
- imagestring ($img,5,$ax[$i],$bx[$i]+1,'('.$x[$i].';'.$y[$i].')',$textcol);
este linia care face sa apara pe grafic valorile numerice.. in caz ca vreti sau nu sa va apara, o stergeti.
Am facut si o interfata pentru generarea graficului.
COD:
<?php
session_start();
if(!isset($_SESSION['linii'])){
$_SESSION['linii'] = 10;
$_SESSION['coloane'] = 20;
$_SESSION['height'] = 250;
$_SESSION['width'] = 600;
}
if(!isset($_SESSION['in']) || strlen($_SESSION['in'] <3)){
$_SESSION['in'] = '3,2
5,6
8,4.21';
}
$in='3,2;5,6;8,4.21';
$dimensiuni = '10,20,250,600';
if(isset($_POST['input'])){
$_SESSION['in'] = $_POST['input'];
$exp=explode("\n", $_POST['input']);
$in='';
for($i=0; $i<count($exp); $i++){
if(strlen($exp[$i]) > 2){
$in=$in.$exp[$i].';';
}
}
$in=substr($in, 0, strlen($in)-1);
$_SESSION['linii'] = $_POST['linii'];
$_SESSION['coloane'] = $_POST['coloane'];
$_SESSION['height'] = $_POST['inaltime'];
$_SESSION['width'] = $_POST['latime'];
$dimensiuni = $_SESSION['linii'].','.$_SESSION['coloane'].','.$_SESSION['height'].','.$_SESSION['width'];
}
echo '<img src="graph.php?in='.$in.'&dimensiuni='.$dimensiuni.'"></img>';
?>
<br>
<table border="1">
<th>Punctele de<br>coordonate x,y</th>
<th>Dimensiuni</th>
<th>Intrebari?</th>
<tr><td><center>
<form action="" method="POST">
<textarea rows="4" cols="5" name="input">
<?php
echo $_SESSION['in'];
?>
</textarea><br>
<input type="submit" name="submit" value="Genereaza">
</td><td>
<table border="0">
<tr><td>Inaltime:</td><td><input type="text" name="inaltime" size="2" value="<?php echo $_SESSION['height']; ?>"> px</td></tr>
<tr><td>Latime:</td><td><input type="text" name="latime" size="2" value="<?php echo $_SESSION['width']; ?>"> px</td></tr>
<tr><td>Linii:</td><td><input type="text" name="linii" size="2" value="<?php echo $_SESSION['linii']; ?>"></td></tr>
<tr><td>Coloane:</td><td><input type="text" name="coloane" size="2" value="<?php echo $_SESSION['coloane']; ?>"></td></tr>
</table>
</td><td valign="top">
*Coordonatele x sau y pot fi scrise cu zecimale despartite prin punct. <b>Ex: 4.2 sau 8.7</b><br>
*Inaltimea, si latimea reprezinta dimensiunile graficului masurate in pixeli<br>
*Liniile si coloanele reprezinta numarul de delimitari in functie de dimensiune (modificati si veti intelege)
</td>
</form></center>
</tr>
</table>
Graficul aici:
COD:
<?php
if(isset($_GET['in'])){
$in = $_GET['in'];
$exp = explode(';', $in);
for($i=0; $i<count($exp); $i++){
$puncte[$i+1] = $exp[$i];
}
$linii = 10;
$coloane = 20;
$height = 250;
$width = 600;
if(isset($_GET['dimensiuni'])){
$exp = explode(',',$_GET['dimensiuni']);
$linii = $exp[0];
$coloane = $exp[1];
$height = $exp[2];
$width = $exp[3];
}
header ("Content-type: image/jpeg");
$img = imagecreate ($width,$height);
$fond = imagecolorallocate ($img,211,211,211);
$col = imagecolorallocate ($img,0,0,0);
$linecol = imagecolorallocate ($img,82,10,26);
$textcol = imagecolorallocate ($img,0,34,102);
imageline ($img,0,$width,0,0,$col);
imageline ($img,$width,0,0,0,$col);
imageline ($img,0,$height-1,$width,$height-1,$col);
imageline ($img,$width-1,0,$width-1,$height,$col);
//forsyn
$ay=0;
for($i=0; $i<=$linii; $i++){
$ay=$ay+$height/$linii;
imageline ($img,0,$ay,$width,$ay,$col);
}
//forsyn
//forsxn
$ay=0;
for($i=0; $i<=$coloane; $i++){
$ay=$ay+$width/$coloane;
imageline ($img,$ay,0,$ay,$height,$col);
}
//forsxn
for($i=1; $i<=count($puncte); $i++){
$exp = explode(',', $puncte[$i]);
$x[$i] = $exp[0];
$y[$i] = $exp[1];
}
for($i=1; $i<=count($x); $i++){
$ax[$i] = $x[$i]*$width/$coloane;
$bx[$i] = $y[$i]*$height/$linii;
$bx[$i] = $height-$bx[$i];
imagestring ($img,5,$ax[$i],$bx[$i]+1,'('.$x[$i].';'.$y[$i].')',$textcol);
}
for($i=1; $i<count($bx); $i++){
imageline ($img,$ax[$i],$bx[$i],$ax[$i+1],$bx[$i+1],$linecol);
}
imagejpeg ($img, '', 100);
}
?>
Evident, trebuie ca fisierul cu graficul sa aiba denumirea graph.php
Data publicarii: 05-05-2011 -
Copyright © Croce Alexandru
Apasati aici daca doriti sa vedeti alte articole de acelasi autor
Exista 2 articole asemanatoare, apasati aici pentru lista.
