Adding customized straight line on x-axis by jpgrph - charts

Question

I would like to ask how to add the customized line into chart by using jpgraph. For example, to identify SUNDAY on date which selecting from database, the jpgraph will draw a straight line with red color on each Sunday which will be showed on x-axis.
Does anyone meet the related issue and has been solved? Please tell me, thank you.
The code of my situation:
`
$dateLocale = new DateLocale();
$dateLocale->Set('');
$file_date = date("Ymd");
$dateArray = array();
$dataSuccessful = array(); //get from db
$dataUser_not_found = array();
$dataAcc_not_activated = array();
$dataUnsuccess_others = array();
$conn = new mysqli($dbhost, $dbuser, $dbpass, $dbname);
//Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "example";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
$dateArray[] = date("d/m/Y (D)", strtotime($row["date"]));
$dataSuccessful[] = $row["login_success_count"];
$dataUser_not_found[] = $row["unsuccess_not_found"];
$dataAcc_not_activated[] = $row["unsuccess_not_activated"];
$dataUnsuccess_others[] = $row["unsuccess_others"];
}
} else {
echo "No results in this table";
}
function strBefore($string, $substring) {
$pos = strpos($string, $substring);
if($pos === false){
return $string;
}else{
return(substr($string, 0, $pos));
}
}
function strAfter($string, $substring) {
$pos = strpos($string, $substring);
if($pos === false){
return $string;
}else{
return(substr($string, $pos+strlen($substring)));
}
}
JpgraphError::SetImageFlag(false);
JpGraphError::SetLogFile('syslog');
// Create the graph.
$graph = new Graph(2560, 1320);
//initialization of the default theme
$graph->ClearTheme();
//$graph->SetScale('datlin',0,$x_max);
$graph->SetScale('datlin');
$graph->img->SetMargin(60,150,50,60);
$graph->SetShadow();
// Create the linear plot (SUCCESSFUL)
$l1plot=new LinePlot($dataSuccessful);
$l1plot->SetColor('lightblue:0.4');
$l1plot->SetFillColor("lightblue:0.7");
$l1plot->SetWeight(2);
$l1plot->SetLegend('The total number of visit (SUCCESSFUL)');
// Create the linear plot (UNSUCCESSFUL)
$user_not_found_plot = new LinePlot($dataUser_not_found);
$user_not_found_plot->SetColor('orange:1.2');
$user_not_found_plot->SetFillColor('orange#0.2');
$user_not_found_plot->SetLegend('(UNSUCCESSFUL) User not found');
$acc_not_activated_plot = new LinePlot($dataAcc_not_activated);
$acc_not_activated_plot->SetColor('green:0.8');
$acc_not_activated_plot->SetFillColor('green#0.4');
$acc_not_activated_plot->SetLegend('(UNSUCCESSFUL) Account not activated');
$others_plot = new LinePlot($dataUnsuccess_others);
$others_plot->SetColor('lightred:1.2');
$others_plot->SetFillColor('lightred#0.4');
$others_plot->SetLegend('(UNSUCCESSFUL) Others');
$graph->title->Set('log report');
$graph->xaxis->title->Set('Last 30 days');
$graph->title->SetFont(FF_FONT1,FS_BOLD);
$graph->yaxis->title->SetFont(FF_FONT1,FS_BOLD);
$graph->xaxis->title->SetFont(FF_FONT1,FS_BOLD);
$graph->setYScale(0, 'lin', 0, 2000);
/* Add the plots to the graph */
//SUCCESSFUL numbers
$graph->Add($l1plot);
//UNSUCCESSFUL numbers
$graph->AddY(0,$user_not_found_plot);
$graph->AddY(0,$acc_not_activated_plot);
$graph->AddY(0,$others_plot);
$graph->ynaxis[0]->SetColor('red');
$graph->ynaxis[0]->title->Set('The number of visit (UNSUCCESSFUL)');
$graph->ynaxis[0]->scale->SetGrace(80);
//As demo, set the specific date on x-axis
$graph->xaxis->SetLabelFormatString('d/m/Y',true);
$graph->xaxis->setTickLabels($dateArray);
// Display the graph
// Get the handler to prevent the library from sending the image to the browser
$gdImgHandler = $graph->Stroke(_IMG_HANDLER);
// Default is PNG so use ".png" as suffix
$fileName = "pic/oul207_log_".$file_date.".png";
$graph->img->Stream($fileName);
?>`

Answer 1

I guess you don't want a tick, so here's how to add a red vertical line:
require_once ('jpgraph/jpgraph_plotline.php');
$v_plot = new PlotLine();
$v_plot->SetDirection(VERTICAL);
$v_plot->SetColor('red');
$v_plot->SetPosition(2);
$graph->AddLine($v_plot);
Of course you'd need to calculate your sunday(s) relative to the x-axis and set the position(s) accordingly.