The _php technique of the curve statistic graph representation of PHP implementation

The examples in this article describe the graph of curve statistics that PHP implements. Share to everyone for your reference, specific as follows:

<?php/****************************** * Line chart Generation function * Youd * 090207-01 ******************************/func tion Line_stats_pic ($value _y, $width, $high, $strong =1, $fix =0) {//y value processing functions function line_point_y ($num, $width, $high, $max _num_add, $min _num_add, $y _pxdensity) {$return = $high-floor (($num-$min _num_add+ $y _pxdensity)/($max _num_add-$min _
  Num_add)/$high));
return $return;
///Parameter processing $allnum =sizeof ($value _y);              $max _num=max ($value _y);              The maximum value $min _num=min ($value _y);            The minimum value $limit _m= $max _num-$min _num;        Extremely poor $max _num_add= $max _num+ $limit _m*0.1;        The axle maximum value $min _num_add= $min _num-$limit _m*0.1;         Axis minimum $limit = $max _num_add-$min _num_add;  Extreme difference-Axis y $y _pxdensity= ($max _num_add-$min _num_add)/$high;        Y-Axis density $x _pxdensity=floor ($width/$allnum);                 X-axis density reset ($value _y);
Returning the array pointer to zero $i = 0;
  foreach ($value _y as $val) {$point _y[$i]=line_point_y ($val, $width, $high, $max _num_add, $min _num_add, $y _pxdensity);
$i + +; } $zero _y=line_point_y(0, $width, $high, $max _num_add, $min _num_add, $y _pxdensity);          The Y-value of 0 points $empty _size_x= (strlen ($max _num) > strlen ($min _num) strlen ($max _num): strlen ($min _num)) *5+3;
Left blank//Picture stream start Header ("Content-type:image/png");
$pic =imagecreate ($width + $empty _size_x+10, $high +13);     Imagecolorallocate ($pic, 255,255,255); Background color $color _1=imagecolorallocate ($pic, 30,144,255);   Line Color $color _2=imagecolorallocate ($pic, 0,0,0);          Black $color _3=imagecolorallocate ($pic, 194,194,194);//Gray//Imagesetthickness ($pic, 1);       Grid line width $y _line_width=floor ($width/100); Number of vertical grid lines $y _line_density= $y _line_width==0? 0:floor ($width/$y _line_width); Longitudinal grid line density $point _zero_y= $zero _y > $high?
$high: $zero _y; Imagestring ($pic, 1, $empty _size_x-1, $high +4, "0", $color _2);         0-Point Axis mark for ($i =1; $i <= $y _line_width $i + +) {//Draw vertical grid line imagesetthickness ($pic, 1);
  Grid line width imageline ($pic, $y _line_density* $i + $empty _size_x,0, $y _line_density* $i + $empty _size_x, $high, $color _3);       Imagesetthickness ($pic, 2);  Axis Point line width imageline ($pic, $y _line_density* $i + $empty _size_x, $point _zero_y-4, $y _line_density* $i + $empty _size_x, $point _
  Zero_y, $color _2);  Imagestring ($pic, 1,100* $i + $empty _size_x-5, $high +4, $allnum/$y _line_width* $i, $color _2);        Axis Mark} $x _line_width=floor ($high/30); Number of horizontal grid lines $x _line_density= $x _line_width==0?  0:floor ($high/$y _line_width); Horizontal Grid line Density if ($zero _y > $high) {//Draw horizontal grid line imagestring ($pic, 1,0, $high -3,round ($min _num_add, $fix), $color _2);        /0 Dot Axis mark for ($i =1; $i <= $x _line_width $i + +) {imagesetthickness ($pic, 1); Grid line width imageline ($pic, 0+ $empty _size_x, $high-$x _line_density* $i, $width + $empty _size_x, $high-$x _line_density* $i, $
   Color_3);        Imagesetthickness ($pic, 2); Axis Point line width imageline ($pic, 0+ $empty _size_x, $high-$x _line_density* $i, 3+ $empty _size_x, $high-$x _line_density* $i, $color _
   2);  Imagestring ($pic, 1,0, $high-$x _line_density* $i -3,round ($limit/$x _line_width* $i + $min _num_add, $fix), $color _2); Axis Mark}}else{imagestring ($pic, 1, $empty _size_x-8, $zEro_y, "0", $color _2);        0-Point Axis mark for ($i =1; $i <= ceil ($x _line_width/2); $i + +) {imagesetthickness ($pic, 1); Grid line width imageline ($pic, 0+ $empty _size_x, $zero _y-$x _line_density* $i, $width + $empty _size_x, $zero _y-$x _line_density*$
   I, $color _3); if ($zero _y+ $x _line_density* $i < $high) {Imageline ($pic, 0+ $empty _size_x, $zero _y+ $x _line_density* $i, $width +$
   empty_size_x, $zero _y+ $x _line_density* $i, $color _3);        } imagesetthickness ($pic, 2); Axis Point line width imageline ($pic, 0+ $empty _size_x, $zero _y-$x _line_density* $i, 3+ $empty _size_x, $zero _y-$x _line_density* $i, $
   color_2); if ($zero _y+ $x _line_density* $i < $high) {Imageline ($pic, 0+ $empty _size_x, $zero _y+ $x _line_density* $i, 3+ $empty _
   size_x, $zero _y+ $x _line_density* $i, $color _2);   Imagestring ($pic, 1,0, $zero _y-$x _line_density* $i -3,round ($limit/$x _line_width* $i, $fix), $color _2); Axis Mark if ($zero _y+ $x _line_density* $i < $high) {imagestring ($pic, 1,0, $zero _y+ $x _line_density* $i -3,round (-$limit/  $x _line_width* $i, $fix), $color _2); //axis Mark}}//Draw Axis imagesetthickness ($pic, 2);
Axis width imageline ($pic, 1+ $empty _size_x,0,1+ $empty _size_x, $high, $color _2); if ($zero _y > $high) {//x axis position imageline ($pic, 0+ $empty _size_x, $high, $width + $empty _size_x, $high, $color _2);
else{imageline ($pic, 0+ $empty _size_x, $zero _y, $width + $empty _size_x, $zero _y, $color _2);}//produce polyline $point _x=0;
$j = 0;       Imagesetthickness ($pic, $strong); Line thickness while ($j +1 < $allnum) {Imageline ($pic, $point _x+2+ $empty _size_x, $point _y[$j], $point _x+ $x _pxdensity+2+$
  empty_size_x, $point _y[$j +1], $color _1);
  $point _x+= $x _pxdensity;
$j + +;
} imagepng ($pic);
Imagedestroy ($pic);
}/* Function description and Example parameter description: $value _y--------contains the array you want to generate a line chart, requiring the key value to increment from 0. $width--------The grid width (not white edge) of the generated line chart $high--------height $strong-------line thickness (default is 1) $fix the number of digits reserved for the-------data (default is rounding)/for ($i =0; $i
    <100; $i + +) {$value = rand (1,200);
$value _y[]= $value;

 Line_stats_pic ($value _y,500,100,1,1);?>

The results of the operation are as follows:

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I hope this article will help you with the PHP program design.