在imagecolorallocate($image, ...$this->text_color)In,...The preceding part denotes the array unpacking operator, commonly known as the unpacking operator or extension operator. It allows you to pass the values from an array as individual parameters to a function.
In this example,$this->text_color It is an integer array containing three color components: red, green, and blue.imagecolorallocate() The function expects these values to be passed as individual parameters; however, the spread operator can be used to pass array elements as individual parameters automatically, eliminating the need to manually specify each element, for example.imagecolorallocate($image, $this->text_color[0], $this->text_color[1], $this->text_color[2])。
therefore,...$this->text_color Indicates that will $this->text_color Each element of the array is passed as a parameter to imagecolorallocate() The function implements the automatic array expansion feature.
