PHP - 関数(sprintf, dechex)

開発環境

OS X Lion - Apple(OS)
Apache (Web Server)
PHP (サーバーサイドプログラミング言語)
TextWrangler(Text Editor) (BBEditの無料機能制限版、light版)

『初めてのPHP5』 (David Sklar 著、桑村潤翻訳、廣川類翻訳、オライリー・ジャパン、2005年、ISBN978-4-87311-257-2)の5章(関数)5.6(演習問題)4を解いてみる。

<?php
  function get_color($red, $green, $blue){
    return sprintf("#%02s%02s%02s",
      dechex($red), dechex($green), dechex($blue));
  }
  $result = "";
  for($i = 0; $i < 245; $i += 10){
    for($j = 0; $j < 245; $j += 10){
      for($k = 0; $k < 245 ; $k += 10){
        $color = get_color($i, $j, $k);
        $result .= "<span style=\"color:$color\">$color</span>";
      }
      $result .= "<br />";
    }
    $result .= "<br />";
  }
  print "<h1><span style=\"color:#ff0000\">赤(#ff0000)</span>、" .
    "<span style=\"color:#00ff00\">緑(#00ff00)</span>、" .
    "<span style=\"color:#0000ff\">青(#0000ff)</span>" .
    "に関する16進法のカラー値を連結して作成した色一覧</h1>";
  print $result;
?>

HTMLソース

<h1><span style="color:#ff0000">赤(#ff0000)</span>、<span style="color:#00ff00">緑(#00ff00)</span>、<span style="color:#0000ff">青(#0000ff)</span>に関する16進法のカラー値を連結して作成した色一覧</h1><span style="color:#000000">#000000</span><span style="color:#00000a">#00000a</span><span style="color:#000014">#000014</span><span style="color:#00001e">#00001e</span><span style="color:#000028">#000028</span><span style="color:#000032">#000032</span><span style="color:#00003c">#00003c</span><span style="color:#000046">#000046</span><span style="color:#000050">#000050</span><span style="color:#00005a">#00005a</span><span style="color:#000064">#000064</span><span style="color:#00006e">#00006e</span><span style="color:#000078">#000078</span><span style="color:#000082">#000082</span><span style="color:#00008c">#00008c</span><span style="color:#000096">#000096</span><span style="color:#0000a0">#0000a0</span><span style="color:#0000aa">#0000aa</span><span style="color:#0000b4">#0000b4</span><span style="color:#0000be">#0000be</span><span style="color:#0000c8">#0000c8</span><span style="color:#0000d2">#0000d2</span><span style="color:#0000dc">#0000dc</span><span style="color:#0000e6">#0000e6</span><span style="color:#0000f0">#0000f0</span><br /><span style="color:#000a00">#000a00</span><span style="color:#000a0a">#000a0a</span><span style="color:#000a14">#000a14</span><span style="color:#000a1e">#000a1e</span><span style="color:#000a28">#000a28</span><span style="color:#000a32">#000a32</span><span style="color:#000a3c">#000a3c</span><span style="color:#000a46">#000a46</span><span style="color:#000a50">#000a50</span><span style="color:#000a5a">#000a5a</span><span style="color:#000a64">#000a64</span><span style="color:#000a6e">#000a6e</span><span style="color:#000a78">#000a78</span><span style="color:#000a82">#000a82</span><span style="color:#000a8c">#000a8c</span><span style="color:#000a96">#000a96</span><span style="color:#000aa0">#000aa0</span><span style="color:#000aaa">#000aaa</span><span style="color:#000ab4">#000ab4</span><span style="color:#000abe">#000abe</span><span style="color:#000ac8">#000ac8</span><span style="color:#000ad2">#000ad2</span><span style="color:#000adc">#000adc</span><span style="color:#000ae6">#000ae6</span><span style="color:#000af0">#000af0</span><br /><span style="color:#001400">#001400</span><span style="color:#00140a">#00140a</span><span style="color:#001414">#001414</span><span style="color:#00141e">#00141e</span><span style="color:#001428">#001428</span><span style="color:#001432">#001432</span><span style="color:#00143c">#00143c</span><span style="color:#001446">#001446</span><span style="color:#001450">#001450</span><span style="color:#00145a">#00145a</span><span style="color:#001464">#001464</span><span style="color:#00146e">#00146e</span><span style="color:#001478">#001478</span><span style="color:#001482">#001482</span><span style="color:#00148c">#00148c</span><span style="color:#001496">#001496</span><span style="color:#0014a0">#0014a0</span><span style="color:#0014aa">#0014aa</span><span style="color:#0014b4">#0014b4</span><span style="color:#0014be">#0014be</span><span style="color:#0014c8">#0014c8</span><span style="color:#0014d2">#0014d2</span><span style="color:#0014dc">#0014dc</span><span style="color:#0014e6">#0014e6</span><span style="color:#0014f0">#0014f0</span><br /><span style="color:#001e00">#001e00</span><span style="color:#001e0a">#001e0a</span><span style="color:#001e14">#001e14</span><span style="color:#001e1e">#001e1e</span><span style="color:#001e28">#001e28</span><span style="color:#001e32">#001e32</span><span style="color:#001e3c">#001e3c</span><span style="color:#001e46">#001e46</span><span style="color:#001e50">#001e50</span><span style="color:#001e5a">#001e5a</span><span style="color:#001e64">#001e64</span><span style="color:#001e6e">#001e6e</span><span style="color:#001e78">#001e78</span><span style="color:#001e82">#001e82</span><span style="color:#001e8c">#001e8c</span><span style="color:#001e96">#001e96</span><span style="color:#001ea0">#001ea0</span><span style="color:#001eaa">#001eaa</span><span style="color:#001eb4">#001eb4</span><span style="color:#001ebe">#001ebe</span><span style="color:#001ec8">#001ec8</span><span style="color:#001ed2">#001ed2</span><span style="color:#001edc">#001edc</span><span style="color:#001ee6">#001ee6</span><span style="color:#001ef0">#001ef0</span><br /><span style="color:#002800">#002800</span><span style="color:#00280a">#00280a</span><span style="color:#002814">#002814</span><span style="color:#00281e">#00281e</span><span style="color:#002828">#002828</span><span style="color:#002832">#002832</span><span style="color:#00283c">#00283c</span><span style="color:#002846">#002846</span><span style="color:#002850">#002850</span><span style="color:#00285a">#00285a</span><span style="color:#002864">#002864</span><span style="color:#00286e">#00286e</span><span style="color:#002878">#002878</span><span style="color:#

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2012年11月5日月曜日

PHP - 関数(sprintf, dechex)

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