使用php分离rgba颜色值的红、绿、蓝值

我是这个格式的rgba（205,31,31,1）的hv rgba值，我想分离每个红色、绿色、蓝色和alpha值，以便进一步处理如何使用php实现它；所以输出看起来像

red = 205
green = 31
blue = 31
alpha =1

---

将

preg_match

与正则表达式一起使用：

$string = "RGBA(205,31,31,1)";
if(preg_match("/RGBA\((\d+),(\d+),(\d+),(\d+)\)/", $string, $matches)) {
  // $matches[0] contains the complete matched value, so we can ignore that
  echo "red = " . $matches[1] . "\n";
  echo "green = " . $matches[2] . "\n";
  echo "blue = " . $matches[3] . "\n";
  echo "alpha = " . $matches[4] . "\n";
}

---

将

preg_match

与正则表达式一起使用：

$string = "RGBA(205,31,31,1)";
if(preg_match("/RGBA\((\d+),(\d+),(\d+),(\d+)\)/", $string, $matches)) {
  // $matches[0] contains the complete matched value, so we can ignore that
  echo "red = " . $matches[1] . "\n";
  echo "green = " . $matches[2] . "\n";
  echo "blue = " . $matches[3] . "\n";
  echo "alpha = " . $matches[4] . "\n";
}

---

将

preg_match

与正则表达式一起使用：

$string = "RGBA(205,31,31,1)";
if(preg_match("/RGBA\((\d+),(\d+),(\d+),(\d+)\)/", $string, $matches)) {
  // $matches[0] contains the complete matched value, so we can ignore that
  echo "red = " . $matches[1] . "\n";
  echo "green = " . $matches[2] . "\n";
  echo "blue = " . $matches[3] . "\n";
  echo "alpha = " . $matches[4] . "\n";
}

---

将

preg_match

与正则表达式一起使用：

$string = "RGBA(205,31,31,1)";
if(preg_match("/RGBA\((\d+),(\d+),(\d+),(\d+)\)/", $string, $matches)) {
  // $matches[0] contains the complete matched value, so we can ignore that
  echo "red = " . $matches[1] . "\n";
  echo "green = " . $matches[2] . "\n";
  echo "blue = " . $matches[3] . "\n";
  echo "alpha = " . $matches[4] . "\n";
}

可能的重复可能的重复可能的重复可能的重复