PHP output diamond (1)

<code><span><span><?php</span>
header(<span>"Content-type:text/html;charset=utf-8"</span>);
<span>echo</span><span>"第一个"</span>;
<span>echo</span><span>"<br/>"</span>;
<span>$num</span>=<span>14</span>;
    <span>for</span> (<span>$i</span>=<span>1</span>; <span>$i</span> <= <span>$num</span>; <span>$i</span>++) {
        <span>for</span> (<span>$k</span>=<span>0</span>; <span>$k</span> <= <span>$num</span> - <span>$i</span>; <span>$k</span>++) {
          <span>echo</span><span>' '</span>;
        }
        <span>for</span> (<span>$j</span>=<span>1</span>; <span>$j</span> <= <span>$i</span>*<span>2</span>-<span>1</span>; <span>$j</span>++) {
          <span>echo</span><span>' *'</span>;
        }
        <span>echo</span><span>'<br/>'</span>;

    }
    <span>for</span> (<span>$i</span>=<span>$num</span>-<span>1</span>; <span>$i</span> >= <span>1</span>; <span>$i</span>--) {
      <span>for</span> (<span>$k</span>=<span>$num</span> - <span>$i</span>; <span>$k</span>>=<span>0</span> ; <span>$k</span>--) {
        <span>echo</span><span>' '</span>;
      }
      <span>for</span> (<span>$j</span>=<span>$i</span> *<span>2</span> -<span>1</span>; <span>$j</span> >= <span>1</span>; <span>$j</span> --) {
        <span>echo</span><span>' *'</span>;
      }
        <span>echo</span><span>'<br/>'</span>;

    }
<span>echo</span><span>"<hr/>"</span>;
<span>echo</span><span>"第二个"</span>;
<span>echo</span><span>"<br/>"</span>;
<span>for</span> (<span>$i</span>=<span>1</span>; <span>$i</span> <= <span>$num</span>; <span>$i</span>++) {
    <span>for</span> (<span>$k</span>=<span>0</span>; <span>$k</span> <= <span>$num</span> - <span>$i</span>; <span>$k</span>++) {
      <span>echo</span><span>' '</span>;
    }
    <span>for</span> (<span>$j</span>=<span>1</span>; <span>$j</span> <= <span>$i</span>*<span>2</span>-<span>1</span>; <span>$j</span>++) {
      <span>if</span> (<span>$j</span> == <span>1</span> || <span>$j</span> == <span>$i</span> *<span>2</span>-<span>2</span> ) {
        <span>echo</span><span>' *'</span>;
      }
      <span>echo</span><span>' -'</span>;
    }
    <span>echo</span><span>'<br/>'</span>;

}
<span>for</span> (<span>$i</span>=<span>$num</span>-<span>1</span>; <span>$i</span> >= <span>1</span>; <span>$i</span>--) {
  <span>for</span> (<span>$k</span>=<span>$num</span> - <span>$i</span>; <span>$k</span>>=<span>0</span> ; <span>$k</span>--) {
    <span>echo</span><span>' '</span>;
  }
  <span>for</span> (<span>$j</span>=<span>$i</span> *<span>2</span> ; <span>$j</span> >= <span>1</span>; <span>$j</span> --) {
    <span>if</span> (<span>$j</span> == <span>1</span> || <span>$j</span> == <span>$i</span> *<span>2</span>-<span>1</span> ) {
      <span>echo</span><span>'* '</span>;
    }
    <span>echo</span><span>' -'</span>;
  }
    <span>echo</span><span>'<br/>'</span>;
}

<span>echo</span><span>"<hr/>"</span>;
<span>?></span></code>

').addClass('pre-numbering').hide(); $(this).addClass('has-numbering').parent().append($numbering); for (i = 1; i ').text(i)); }; $numbering.fadeIn(1700); }); });

The above has introduced the PHP output diamond (1), including aspects of the content. I hope it will be helpful to friends who are interested in PHP tutorials.