These are the default variables for the position, text contents, and color, font size, fade-in and fade-out speed in milliseconds, and an array to hold the display string.

这些是位置、文本内容和颜色、字体大小、淡入和淡出速度(以毫秒为单位)及保存显示字符串的数组的默认变量。

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This speedup is due to the fact that the array is a fixed size, not a variable-sized one like the default PHP one is, and that non-numeric indexes are not allowed.

造成这种速度优势的原因是数组是固定大小的，而默认的 PHP 数组是可变大小的，并且不允许非数值型索引。

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