Aligning php Generated Image dynamic text in center

Question

i want to align the text generated on the image to the center of the image. for the moment, i dont know if it is possible to align it. below is the code.

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Answer 1

foreach ($user as $key=>$value){    
    $bb = imagettfbbox($value['font-size'],0,$fontname,$value['name']);    
    $WW = abs($bb[2]-$bb[0]);    
    $XX = ($value['XPos']+$WW);    
    $HH = abs($bb[5]-$bb[3]);    
    $HH +=1;
    $HHH += $HH;
    imagettftext($im, $value['font-size'], 0, $value['XPos'],   $value['YPos'], $color[$value['color']], $fontname, $value['name']);  
    $HHH += 1;
    $WIDE = abs($bb[2]-$bb[0]);  
    $endpoint=$value['XPos']+$WIDE;  
    $bb2 = imagettfbbox($value['font-size'],0,$fontname,$value['name']);  
    $WW2 = abs($bb2[2]-$bb2[0]);     
    $x2pos= $endpoint-$WW2;    
    imagettftext($im, $value['font-size'], 0, $x2pos, $value['YPos'], $color[$value['color']], $fontname, $value['name']);
}