预定义常量

    下列常量由此扩展定义，且仅在此扩展编译入 PHP 或在运行时动态载入时可用。

    The following two tables lists all constants defined by the ps extension.

    Contants for line caps
    NameMeaning
    ps_LINECAP_BUTT 
    ps_LINECAP_ROUND 
    ps_LINECAP_SQUARED 
    Contants for line joins
    NameMeaning
    ps_LINEJOIN_MITER 
    ps_LINEJOIN_ROUND 
    ps_LINEJOIN_BEVEL 
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