总结
<span><?php</span><span>$nums</span> = <span>array</span>(<span>1</span>, <span>2</span>, <span>3</span>); <span>$arr_name</span> = <span>'nums'</span>; <span>$$arr_name</span>[] = <span>4</span>; print_r(<span>$nums</span>); <span>?></span>
执行上面程序会出现fatal error: cannot use [] for reading，因为语义模糊，要这样改：
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<span><?php</span><span>$nums</span> = <span>array</span>(<span>1</span>, <span>2</span>, <span>3</span>);
<span>$arr_name</span> = <span>'nums'</span>;
${<span>$arr_name</span>}[] = <span>4</span>;
print_r(<span>$nums</span>);
<span>?></span>以上就介绍了php 可变变量的 Fatal error: Cannot use [] for reading，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。
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