语句 echo substr_replace("abcdefg","kk",3,3)的运行结果是: A: abcdefdgkkk B: abckkg C: abkkfg D: kkkabcdefg
语句 echo substr_replace("abcdefg","kk",3,3)的运行结果是: A: abcdefdgkkk B: abckkg C: abkkfg D: kkkabcdefg
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语句 echo substr_replace("abcdefg","kk",3,3)的运行结果是: A: abcdefdgkkk B: abckkg C: abkkfg D: kkkabcdefg