Condiiton et couleur

<?php 
$usersolde = ($usersolde[0]['solder']); $nombre1 = number_format($usersolde, 2, ',', ' '); echo $nombre1;
?>

<?php   
function colorNombre($var){
if($var>0){
return '<font color="green">'.$var.'</font>';
}

elseif($var<0){
return '<font color="red">'.$var.'</font>';
}

else{
return $var;
}

}

$usersolde=array();

$usersolde[0]['solder']=1000000;
$usersolde1 = ($usersolde[0]['solder']);
(string)$nombre1 = number_format($usersolde1, 2, ',', ' '); 
echo '<br />'.colorNombre($nombre1);

$usersolde[1]['solder']=-15698712;
$usersolde2 = ($usersolde[1]['solder']);
(string)$nombre2 = number_format($usersolde2, 2, ',', ' '); 
echo '<br />'.colorNombre($nombre2);
?>

<span class="Style1" style="color:<?php if ($usersolde[0]['solder'] > 0) echo "red";
else echo "black"; ?>">
<?php $usersolde = ($usersolde[0]['solder']); 
$nombre1 = number_format($usersolde, 0, ',', ' '); 
echo $nombre1.' F CFA'; ?></span>