這應該適合你:
只需將你的顏色放入一定範圍的數組。然後遍歷所有顏色,如果$val
在範圍內,則將顏色指定爲$class
並打破循環。
<?php
$arr = [
"green" => ["start" => 0, "end" => 1],
"yellow" => ["start" => 1, "end" => 3],
"orange" => ["start" => 3, "end" => 5],
"red" => ["start" => 5, "end" => 6],
];
$class = "default";
foreach($arr as $color => $range) {
if($val <= $range["end"] && $val >= $range["start"]) {
$class = $color;
break;
}
}
?>
編輯:
從您更新的代碼,這應該爲你工作:
<?php
$arr = [
["start" => 0, "end" => 0.3, "color" => "#0A3A0A"],
["start" => 0.3, "end" => 0.5, "color" => "#1E4E1E"],
["start" => 0.5, "end" => 1, "color" => "#508050"],
["start" => 1, "end" => 1.4, "color" => "#FFFF0A"],
["start" => 1.4, "end" => 1.8, "color" => "#FFFF1E"],
["start" => 1.8, "end" => 2, "color" => "#FFFF32"],
["start" => 2, "end" => 2.4, "color" => "#FFFF46"],
];
$class = "red";
foreach($arr as $range) {
if($val <= $range["end"] && $val >= $range["start"]) {
$class = $range["color"];
break;
}
}
?>
編輯2:
既然你不想「靜態「值,這應該適合你:
<?php
$arr = [
["start" => 0, "end" => 0.8, "colorStart" => "FFE6E6", "colorEnd" => "4C0000", "interval" => ""],
["start" => 0.8, "end" => 1.8, "colorStart" => "C2FFC2", "colorEnd" => "296629", "interval" => ""],
["start" => 1.8, "end" => 2.7, "colorStart" => "C2C2FF", "colorEnd" => "6666FF", "interval" => ""],
];
$arr = array_map(function($v){
$steps = intval((($v["end"] - $v["start"]) * 10));
list($redStart, $greenStart, $blueStart) = array_map("hexdec", str_split($v["colorStart"], 2));
list($redEnd, $greenEnd, $blueEnd) = array_map("hexdec", str_split($v["colorEnd"], 2));
$interval = sprintf("%02d", intval(($redStart - $redEnd)/$steps)) . sprintf("%02d", intval(($greenStart - $greenEnd)/$steps)) . sprintf("%02d", intval(($blueStart - $blueEnd)/$steps));
return array_merge($v, ["interval" => $interval]);
}, $arr);
$val = 1.1;
$class = "FF0000";
foreach($arr as $range) {
if($val < $range["end"] && $val >= $range["start"]) {
$class = "";
$multiplier = intval((($val - $range["start"]) * 10));
list($redAdd, $greenAdd, $blueAdd) = array_map(function($v)use($multiplier){return dechex($v*$multiplier);}, str_split($range["interval"], 2));
list($redStart, $greenStart, $blueStart) = str_split($range["colorStart"], 2);
list($redEnd, $greenEnd, $blueEnd) = str_split($range["colorEnd"], 2);
$colors = ["red", "green", "blue"];
foreach($colors as $color) {
if(hexdec(${$color . "End"}) > hexdec(${$color . "Start"}))
$r = hexdec(${$color . "Start"}) + hexdec(${$color. "Add"});
else
$r = hexdec(${$color . "Start"}) - hexdec(${$color. "Add"});
$class .= sprintf("%02X", ($r >= 0 && $r <= 255 ? $r : ($r<0?0:255)));
}
break;
}
}
echo "<div style='hight:100px;width:200px;background-color:#$class;'>some text</div>";
?>
Demo