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php output hollow diamond:
<code><span>$a</span>=<span>5</span>;<span>/*控制循环行数*/</span><span>for</span>(<span>$i</span>=<span>1</span>;<span>$i</span>$a;<span>$i</span>++){ <span>for</span>(<span>$b</span>=<span>1</span>;<span>$b</span>$a-<span>$i</span>;<span>$b</span>++){ <span>echo</span><span>" "</span>; } <span>for</span>(<span>$c</span>=<span>1</span>;<span>$c</span>$i-<span>1</span>)*<span>2</span>+<span>1</span>;<span>$c</span>++){ <span>if</span>(<span>$c</span>==<span>1</span>||<span>$c</span>==(<span>$i</span>-<span>1</span>)*<span>2</span>+<span>1</span>){ <span>echo</span><span>"*"</span>; }<span>else</span>{ <span>echo</span><span>" "</span>; } } <span>echo</span><span>"<br>"</span>; } <span>for</span>(<span>$i</span>=<span>$a</span>-<span>1</span>;<span>$i</span>>=<span>1</span>;<span>$i</span>--){ <span>for</span>(<span>$b</span>=<span>1</span>;<span>$b</span>$a-<span>$i</span>;<span>$b</span>++){ <span>echo</span><span>" "</span>; } <span>for</span>(<span>$c</span>=<span>1</span>;<span>$c</span>$i-<span>1</span>)*<span>2</span>+<span>1</span>;<span>$c</span>++){ <span>if</span>(<span>$c</span>==<span>1</span>||<span>$c</span>==(<span>$i</span>-<span>1</span>)*<span>2</span>+<span>1</span>){ <span>echo</span><span>"*"</span>; }<span>else</span>{ <span>echo</span><span>" "</span>; } } <span>echo</span><span>"<br>"</span>; }</code>
output result:
').addClass('pre-numbering').hide(); $(this).addClass('has-numbering').parent().append($numbering); for (i = 1; i ').text(i)); }; $numbering.fadeIn(1700); }); });The above introduces the hollow diamond output in PHP, including PHP content. I hope it will be helpful to friends who are interested in PHP tutorials.