regex-search-a.php

親フォルダタブ
<?php
session_cache_limiter('nocache');
session_start();

?>
<!DOCTYPE html>
<html lang="ja">
<head>
<meta content="width=device-width initial-scale=1.0 minimum-scale=1.0 maximum-scale=1.0 user-scalable=no" name="viewport">
<meta charset="UTF-8">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.1/css/bootstrap.css">

<style>
.param {
	width: 400px;
}
textarea {
	width: 50%;
	height: 200px; 
}
</style>

<script>
</script>

</head>
<body>
<h1>アンカー取得 正規表現</h1>

<div id="main">
	<form method="post">

		<p>パターン：<input class="param" type="text" required name="pattern" value="<?= htmlentities($_POST["pattern"]) ?>"></p>
		<p>文 字 列：<textarea name="text"><?= $_POST["text"] ?></textarea></p>
		<p><input type="submit" name="send" value="送信"></p>

	</form>
</div>

<?php
if ( $_SERVER['REQUEST_METHOD'] == "POST" ) {

	$real_pattern = html_entity_decode($_POST["pattern"]);

	$re = "/{$real_pattern}/sm";
	$str = $_POST['text'];

	preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);

	foreach( $matches as $i => $list ) {
		foreach( $list as $j => $value ) {
			$matches[$i][$j] = htmlentities($value);
		}
	}

	print "<pre>";
	print_r($matches);
	print "</pre>";

}
 
?>


</body>
</html>