変数の値を調べる０４

基礎 PHP WEB開発





☆★データーでの確認★☆

変数が特定の型かを調べる


変数が特定の型かを調べる


  • 「調べる型」と「引数に指定した変数の型」が一致すればTrueを返す。


調べるデーター型 使用する関数
文字列型 is_string
整数型 is_int(is_integerやis_longでも可)
浮動小数点 is_double(is_floatやis_realでも可)
論理型 is_bool
配列型 is_array
オブジェクト型 is_object
リソース型 is_resource
NULL型 is_null


【 書式 】

《 PHPスクリプト 》

<?php
	$data1 = "Hellow, world!";   // 文字型
	$data2 = 10;                       // 整数型（１０進数）
	$data3 = 1.545;                  // 不動小数点
	$data4 = True;                    // 論理型
	$data5[0] = "Hellow, world!"; // 配列型
	$data6 = NULL;                   // NULL型

	if (is_string($data1)) {
		print "data1は文字列型です！<br>";
	}
	if (is_integer($data2)) {
		print "data2は整数型です！<br>";
	}
	if (is_double($data3)) {
		print "data3は浮動小数点です！<br>";
	}
	if (is_bool($data4)) {
		print "data4は論理です！<br>";
	}
	if (is_array($data5)) {
		print "data5は配列です！<br>";
	}
	if (is_null($data6)) {
		print "data6はNULL型です！<br>";
	}
?>


ソースコード


ソースコード【 HTML 】

<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<meta name="description" content="変数の処理、プログラム中でデーターを保存するために使うための変数の扱い方。">
<meta name="keywords" content="PHP,変数の処理">
<meta name="viewport" content="width=device-width,initial-scale=2">
<title>変数の処理</title>
<link rel="shortcut icon" href="../favicon.gif">

<!-- IE対策 -->
<!--[if ite IE 9]>
<script src="http://html5shiv.googlecode.com/svn/ttunk/html5.js"></script>
<![endif]-->

<style>
article, aside, dialog, figure, footer, header,  hgroup, menu, nav, section {
	display: block;
}
</style>
<link href="css/style.css" rel="stylesheet" type="text/css" media="all">
</head>

<body>
<div id="container">
  <header>
    <h1><span>変数の値を調べる</span></h1>
  </header>
  <section id="contents">
    <h1><span>1-4</span>変数が特定の型かを調べる</h1>
    <section class="sec-top">
      <h2>変数が特定の型か調べる</h2>
      <p class="mark"><span>P</span>oint</p>
      <div class="box">
        <ul class="list">
          <li>「調べる型」と「引数に指定した変数の型」が一致すればTrueを返す。</li>
        </ul>
      </div>
    </section>
    <section class="list">
      <table>
        <tbody>
          <tr>
            <th>調べるデーター型</th>
            <th>使用する関数</th>
          </tr>
          <tr>
            <td class="second_title">文字列型</td>
            <td>is_string</td>
          </tr>
          <tr>
            <td class="second_title">整数型</td>
            <td>is_int(is_integerやis_longでも可)</td>
          </tr>
          <tr>
            <td class="second_title">浮動小数点</td>
            <td>is_double(is_floatやis_realでも可)</td>
          </tr>
          <tr>
            <td class="second_title">論理型</td>
            <td>is_bool</td>
          </tr>
          <tr>
            <td class="second_title">配列型</td>
            <td>is_array</td>
          </tr>
          <tr>
            <td class="second_title">オブジェクト型</td>
            <td>is_object</td>
          </tr>
          <tr>
            <td class="second_title">リソース型</td>
            <td>is_resource</td>
          </tr>
          <tr>
            <td class="second_title">NULL型</td>
            <td>is_null</td>
          </tr>
        </tbody>
      </table>
    </section>
    <section class="sec-php">
      <h2>ブラウザでの表示</h2>
      <div class="box">
        <?php
	$data1 = "Hellow, world!";   // 文字型
	$data2 = 10;                       // 整数型（１０進数）
	$data3 = 1.545;                  // 不動小数点
	$data4 = True;                    // 論理型
	$data5[0] = "Hellow, world!"; // 配列型
	$data6 = NULL;                   // NULL型

	if (is_string($data1)) {
		print "data1は文字列型です！<br>";
	}
	if (is_integer($data2)) {
		print "data2は整数型です！<br>";
	}
	if (is_double($data3)) {
		print "data3は浮動小数点です！<br>";
	}
	if (is_bool($data4)) {
		print "data4は論理です！<br>";
	}
	if (is_array($data5)) {
		print "data5は配列です！<br>";
	}
	if (is_null($data6)) {
		print "data6はNULL型です！<br>";
	}
?>
      </div>
    </section>
  </section>
  <footer>
    <h1>PHPスクリプト</h1>
    <p>参考資料：<a href="http://d.hatena.ne.jp/webry/20130825/p2#note_second" target="_blank">速攻&amp;活用! Web開発者のためのPHPベストサンプル集</a></p>
    <dl>
      <dt>まとめサイト：</dt>
      <dd>
        <ul>
          <li><a href="http://webrynote.jimdo.com/" target="_blank">動画で確認するscript | FlashとJavaScrip</a></li>
          <li><a href="http://d.hatena.ne.jp/webry/archive?word=%2A%5BWEB%B3%AB%C8%AF%5D" target="_blank">［WEB開発］</a></li>
          <li><a href="http://d.hatena.ne.jp/webry/20130217/p4" target="_blank">［PHP］</a></li>
          <li><a href="http://d.hatena.ne.jp/webry/20130205/p2" target="_blank">［jQuery］</a></li>
          <li><a href="http://d.hatena.ne.jp/webry/20121222/p2" target="_blank">［JavaScript］</a></li>
          <li><a href="http://d.hatena.ne.jp/webry/20130408/p6" target="_blank">［HTML5］</a></li>
        </ul>
      </dd>
    </dl>
    <small>Copyright&copy; 2013 <a href="http://d.hatena.ne.jp/webry/" title="webryのホームページへ" target="_blank">実践するWEBサイト制作 | webnote</a> All Rights Reserved.</small> </footer>
  
  <!-- /#container --> 
</div>
</body>
</html>

ソースコード【 CSS 】

@charset "utf-8";

/* webfont
------------------------------------------------------ */
@import url(http://fonts.googleapis.com/css?family=Lobster);
@import url(http://fonts.googleapis.com/css?family=Bangers);

/* resetcss
------------------------------------------------------ */
html,body,div,h1,h2,h3,h4,h5,h6,p,blockquote,pre,address,ul,ol,li,dl,dt,dd,table,th,td,form,fieldset {

    margin: 0;
    padding: 0;
    line-height: 1.5;
	  font-family:
	    "Hiragino Kaku Gothic ProN",
 	   Meiryo, 
 	   sans-serif;}

    a {
     text-decoration: none;}
 
     ul, ol {
      list-style-type: none;}	
	  
    img {
      border: 0;
	  vertical-align: bottom;}

/* link
----------------------------------------------------- */
a:link {color:#00F;}
a:visited {color:#306;}
a:hover,a:active {color:#F6C;}
footer small a:link,footer small a:visited {color:#fff;}
footer small a:hover,footer small a:active {color:#F00;}
footer small a {font-size: 121%;}
/* base
---------------------------------------------------- */
body {
	color: #333;}

/* layout
---------------------------------------------------- */
#container {
	width: 960px;
	margin: 0 auto;}

header {
	margin: 0 0 20px;
	padding: 24px 30px 18px 70px;
	background: #3D6DFF url(../../images/w_top.png) no-repeat right 30px bottom;
	border-radius: 20px 20px 0 0 / 20px 20px 0 0;
	position: relative;
	color: #fff;}

header h1:before {
	content: "4";
	font-family: 'Lobster', cursive;
	display: block;
	color: #ffff;
	float: left;
	font-size: 196%;
	position: absolute;
	top: 0.2em;
	left: 20px;}

header h1 {
	border-bottom: 5px dotted #fff;}

header h1 span  {
	font-family: 'Bangers', cursive;
	display: block;
	width: 830px;
	margin: 0 auto;}

#contents {
	width: 960px;
	margin: 0 auto;}

#contents h1 {
	padding: 5px 5px 4px;
	background: #3D6DFF url(../../images/w_bottom.png) no-repeat right 30px top;
	font-size: 20px;
	color: #fff;
	overflow: hidden;}

#contents h1 span {
	padding: 0 6px;
	margin: 0 8px 0 3px;
	font-size: 112%;
	border: 1px solid #fff;}

#contents h2 {
	font-size: 18px;}

section {
	margin: 25px 0 0;}

.mark {
	line-height: 1.0;
	font-family: 'Maven Pro', Helverica, Arial, sans-serif;
	float: left;
	background-color: #F60;
	border-radius: 55px / 48px;
	padding: 12px 26px;
	text-align: center;
	font-weight: bold;
	font-size: 14px;
	color: #fff;
	box-shadow: 0 0 0 5px rgba(255,102,0,0.4);}

.mark  span {
	display: block;
	font-size: 32px;
	line-height: 1.0;}

section.sec-top h2 {
	width: 851px;
	float: right;
	padding: 7px 15px 2px;
	border-bottom: 1px dashed #ccc;
	color: #F00;}

.box {
	clear: both;
	width: 88%;
	margin: 0 auto;
	padding: 15px 0 0;}

section.sec-top .box dl dt {
	margin: 15px 0 5px;
	padding: 0 0 0 8px;
	border-left: 6px solid #345EDB;
	font-weight: bold;}

section.sec-top .box dl dt:first-child {
	margin: 0 0 5px;}

section.sec-top .box dl dd {
	margin: 0 0 0 20px;
	padding: 0 18px;}

section.sec-top .box dl dd ul li {
	background: url(../../images/circle.gif) no-repeat left 0.3em;
	padding-left: 20px;}

section.sec-top .box dl dd ul.txt-last li:last-child {
	background: none;
	font-size: 96%;}

section.sec-top .box dl dd ul.txt-last li:last-child::before {
	content: "※";
	font-size: 112%;
	margin: 0 5px 0 -10px;
	color: #F00;}

ul.list {
	list-style: circle;}

span.txt_inline {
	display: block;
	padding: 8px 0 0 20px;
	font-weight: bold;}

#contents section.sec-php h2 {
	font-size: 88%;
	color: #893B45;}

section.sec-php h2:before  {
	content: "▼";
	margin: 0 4px 0 25px;}

section.sec-php .box {
	padding: 20px 15px;
	border: 2px dotted #3FF;
	background: #ECF9FF;}

/*table*/
section.list table {
	width: 91%;
	margin: 0 auto;
	border: 2px #333 solid;
	border-collapse: collapse;
	font-size: 96%}

section.list th,
section.list td {
	width: 50%;
	padding: 2px 16px;
	border: 1px #333 solid;}

section.list th {
	background: #42A0FF;
	color: #fff;}

section.list02 table {
	width: 45%;
	float: left;
	margin: 0 0 0 30px;
	border: 2px #333 solid;
	border-collapse: collapse;
	font-size: 96%}

section.list02 th,
section.list02 td {
	width: 50%;
	padding: 2px 16px;
	border: 1px #333 solid;}

section.list02 th {
	background: #42A0FF;
	color: #fff;}
	
.second_title {
	font-weight: bold;}

.list p:last-of-type:before {
	content: "◎";
	padding: 0 10px 0 0;
	color: #F66;}

.list p:last-of-type {
	width: 88%;
	margin: 15px auto 0;
	padding: 3px 16px 2px;
	border: 1px solid #42A0FF;
	border-radius: 6px / 6px;}

.sec-php p {
	width: 88%;
	margin: 0 auto 5px;
	padding: 3px 16px 2px;
	border: 1px solid #42A0FF;
	border-radius: 6px / 6px;}

/* footer
------------------------------------------------ */
footer {
	position: relative;
	margin: 35px 0 0;
	padding: 5px 10px 55px;
	background: #3D6DFF;
	text-align: center;
	font-size: 12px;
	color: #fff;}

footer h1 {
	font-size: 16px;}

footer h1:before {
	content: "− ";}

footer h1:after {
	content: " −";}

footer dl {
	width: 98%;}

footer dl dt {
	float: left;
	width: 29%;
	text-align: right;}

footer dl dd {
	float: right;
	text-align: left;
	width: 71%;}

footer dl dd ul {
	width: 100%;}

footer dl dd ul li {
	display: inline;
	padding: 0 0 0 5px;}

footer dl dd ul li a:hover {
	background: #4271FF;
	color: #FF666B;}

footer dl dd ul li:after {
	content: ",";}

footer dl dd ul li:last-child::after {
	content: "";}

footer small {
	position: absolute;
	bottom: 0;
	left: 0;
	width: 100%;
	height: 30px;
	padding: 5px 0 0;
	background: rgba(0, 0, 0, 0.75);
	font-size: 83%;
	}


/* clearFix
--------------------------------------------- */
.box:after,
section:after {
  content: ""; 
  display: block; 
  clear: both;}


@media only screen and (max-width:320px) {
	
#container {
	width: 300px;
	padding: 10px;
	margin: 0;}

header {
	width: 272px;
	margin: 0;
	padding: 10px 0 0 28px;
	background: #fff none;
	border-radius: 0 / 0;
	position: relative;
	color: #000;}

header h1:before {
	content: "3";
	font-family: 'Lobster', cursive;
	display: inline;
	color: #f00;
	float: left;
	font-size: 196%;
	position: absolute;
	top: 0;
	left: 0;}

header h1 {
	width: 100%;
	padding: 0 0 5px;
	border-bottom: 2px dotted #ccc;
	font-size: 20px;}

header h1 span  {
	font-family: 'Bangers', cursive;
	display: block;
	width: 100%;
	margin: 0;}

#contents {
	width: 100%;
	margin: 0;}

#contents h1 {
	padding: 0 3px 2px;
	background: #3D6DFF none;
	font-size: 16px;
	color: #fff;
	overflow: hidden;}

#contents h1 span {
	display: block;
	width: 20%;
	padding: 0 6px;
	margin: 2px auto 3px;
	font-size: 112%;
	border: 1px solid #fff;
	text-align: center;}

#contents h2 {
	font-size: 16px;}

section {
	margin: 10px 0 0;}

.mark {
	line-height: 1.0;
	font-family: 'Maven Pro', Helverica, Arial, sans-serif;
	float: right;
	background-color: #F60;
	border-radius: 30px / 30px;
	padding: 12px 20px;
	text-align: center;
	font-weight: bold;
	font-size: 0;
	color: #fff;
	box-shadow: 0 0 0 5px rgba(255,102,0,0.4);}

.mark  span {
	display: block;
	font-size: 24px;
	line-height: 1.0;}

section.sec-top h2 {
	width: 170px;
	float: left;
	padding: 0 70px 0 0;
	border-bottom: 1px dashed #ccc;
	color: #F00;}

.box {
	clear: both;
	width: 100%;
	margin: 0 auto;
	padding: 15px 0 0;}

section.sec-top .box dl dt {
	margin: 0 0 5px;
	padding: 0 0 0 8px;
	border-left: 6px solid #345EDB;
	font-weight: bold;}

section.sec-top .box dl dd {
	margin: 0;
	padding: 0;}

section.sec-top .box dl dd ul li {
	background: url(../../images/circle.gif) no-repeat left 0.4em;
	padding-left: 16px;}

section.sec-top .box dl dd ul.txt-last li:last-child {
	background: none;
	font-size: 96%;}

section.sec-top .box dl dd ul.txt-last li:last-child::before {
	content: "※";
	font-size: 112%;
	margin: 0 5px 0 -10px;
	color: #F00;}

#contents section.sec-php h2 {
	font-size: 88%;
	color: #893B45;}

section.sec-php h2:before  {
	content: "▼";
	margin: 0 4px 0 5px;}

section.sec-php .box {
	width: 280px;
	padding: 10px 5px;
	border: 2px dotted #3FF;
	background: #ECF9FF;}

/*table*/
section.list table {
	width: 300px;
	font-size: 13px;}

section.list th,
section.list td {
	padding: 2px 4px 1px;}

section.list02 table {
	width: 300px;
	float: none;
	margin: 5px 0 0;}
	
section.list02 th,
section.list02 td {
	width: auto;
	padding: 2px 4px 1px;}
	
.second_title {
	width: 100px;
	text-align: center;}
/*table*/

footer {
	position: none;
	margin: 5px 0 0;
	padding: 5px 5px 50px;
	background: #3D6DFF;
	text-align: center;
	font-size: 12px;
	color: #fff;}

footer h1 {
	font-size: 12px;}

footer h1:before {
	content: "− ";}

footer h1:after {
	content: " −";}

footer dl {
	width: 100%;
	padding: 0 0 20px;}

footer dl dt {
	display: block;
	float: none;
	width: 100%;
	text-align: center;}

footer dl dd {
	float: none;
	text-align: center;
	width: 100%;}

footer dl dd ul {
	width: 100%;}

footer dl dd ul li {

	display: inline;
	padding: 0 0 0 5px;}

footer dl dd ul li a:hover {
	background: #4271FF;
	color: #FF666B;}

footer dl dd ul li:after {
	content: ",";}

footer dl dd ul li:last-child::after {
	content: "";}

footer small {
	position: none;
	width: 290px;
	height: auto;
	padding: 5px;
	background: rgba(0, 0, 0, 0.75);
	font-size: 10px;}

footer small a {
	display: block;
	font-size: 13px;}
}

ブラウザで表示【 FireFox 】




IEtester【 IE8 】




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HTML5 Outliner【 Chrome 】




iPhone【 MbileSfari 】