break语句用在循环体或switch当中，意思是跳出当前循环。如果break出现在switch中是跳出switch当前switch语句体。在for循环中是跳出本层循环。而continue是本次循环，跳过本次循环后面的语句，继续下一次循环。
Eg：99乘法表
<code><span>for</span>(<span>$i</span>=<span>1</span>;<span>$i</span><<span>10</span>;<span>$i</span>++){
<span>for</span>(<span>$j</span>=<span>1</span>;<span>$j</span><=<span>$i</span>;<span>$j</span>++){
<span>if</span>(<span>$j</span>==<span>3</span>)
<span>//会跳过j=3的算式</span><span>continue</span>;
<span>echo</span><span>$i</span>.<span>'x'</span>.<span>$j</span>.<span>'='</span>.<span>$i</span>*<span>$j</span>.<span>' '</span>;
}
<span>echo</span><span>"<br/>"</span>;
}</code>巡行结果：当j=3的时候，会结束本次循环，继续下次循环，不会出现i*3这一列
<code><span>for</span>(<span>$i</span>=<span>1</span>;<span>$i</span><<span>10</span>;<span>$i</span>++){
<span>for</span>(<span>$j</span>=<span>1</span>;<span>$j</span><=<span>$i</span>;<span>$j</span>++){
<span>if</span>(<span>$j</span>==<span>3</span>)
<span>break</span>;
<span>echo</span><span>$i</span>.<span>'x'</span>.<span>$j</span>.<span>'='</span>.<span>$i</span>*<span>$j</span>.<span>' '</span>;
}
<span>echo</span><span>"<br/>"</span>;
}</code>结果：当循环到j=3的时候，会跳出本层循环，i*3和这一列以后的都不会执行，所以结果只会出现i*1和i*2这两列
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