SetXLabelAngle
SetXLabelAngle — Set the text angle for X tick and data labels
Synopsis
$plot->SetXLabelAngle($xla)
    
Description
SetXLabelAngle sets the text angle for X tick and data
labels.
If using TrueType fonts, any angle can be used.
If using built-in GD fonts, only 0 degree and 90 degree text can be used.
    
Parameters
- $xla
- 
Desired angle for label text, in degrees.
           
Notes
The default text angle for X labels is 0 degrees, for horizontal text.