php学习笔记2
文件管理系统
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8">
</head>
<body>
<?php
$path = @$_GET["path"];
if(empty($path)) $path = "./";
$filterList = array("filesystem.php");
$filename = trim($path,"/")."/".@$_GET["name"];
switch(@$_GET["action"]) {
case "del" :
@unlink($filename);
break;
case "add" :
echo $path;
if( file_exists($filename) ) {
die("file exists");
}else{
$f = fopen($filename,"w");
fclose($f);
}
echo $filename;
break;
case "edit" :
$fielinfo = file_get_contents($filename);
echo "<br>";
echo "<form action='filesystem.php?action=update' method='post'>";
echo "<textarea name='content'> {$fielinfo} </textarea>";
echo "<input type='hidden' value='{$filename}' name='name'>";
echo "<input type='submit'>";
echo "</form>";
break;
break;
case "update" :
$content = $_POST["content"];
$f = $_POST["name"];
file_put_contents($f, $content);
break;
default:
}
if( !file_exists($path) || !is_dir($path) ) {
die( $path."目录无效" );
};
echo "<p>{$path}目录</p>";
echo "<p> <form action='filesystem.php' method='get'> 创建文件 : <input type='hidden' name='path' value='{$path}'><input type='hidden' name='action' value='add'></input> <input name='name'><input type='submit'></input></form></p>";
echo "<table border='1'>";
$dir = opendir($path);
if($dir) {
$i = 0;
while($f = readdir($dir)) {
if($f=="."|| $f=="..") continue;
$file = trim($path, "/")."/".$f;
$i++;
echo "<tr>";
echo "<td> {$i} </td>";
echo "<td> {$f} </td>";
echo "<td>".filetype($file)."</td>";
echo "<td>".filesize($file)."</td>";
echo "<td>".date("Y-m-d",filectime($file))."</td>";
if( !in_array($f, $filterList) ) {
echo "<td><a href='filesystem.php?path={$path}&name={$f}&action=del'>删除</a></td>";
echo "<td><a href='filesystem.php?path={$path}&name={$f}&action=edit'>编辑</a></td>";
}
echo "</tr>";
}
}
closedir($dir);
echo "</table>";
?>
</body>
</html>
只能管理文件， 不能管理目录..
打印万年历， 这个666了， 逻辑刚开始没搞懂...：
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8">
</head>
<body>
<?php
@$y = $_GET["Y"] ? $_GET["Y"] : date("Y");
@$m = $_GET["m"] ? $_GET["m"] : date("m");
echo $y;
echo $m;
$t = date("t",mktime(0,0,0,$m, 1, $y));
$w = date("w",mktime(0,0,0,$m, 1, $y));
$arr = array("周一","周二","周三","周四","周五","周六","周日");
echo "<h4>{$y}年{$m}月</h4>";
echo "<table><thead><tr>";
foreach($arr as $d) {
echo "<td>{$d}</td>";
}
echo "</tr></thead><tbody>";
echo "<tr>";
$temp = 1;
for($i=1; $i<$t+1; ) {
for($j=0;$j<7;$j++) {
if($temp<($w+1)) {
echo "<td>_</td>";
$temp++;
continue;
}
if($i<$t+1 ) {
echo "<td>{$i}</td>";
$i++;
}
}
echo "</tr><tr>";
}
echo "</tr>";
echo "</tbody>";
echo "</table>";
?>
</body>
</html>
php高版本还支持定界符， 相对于js中的``符号， 内部的代码会原封不动的输出：
<?php $str = 'abc'; print<<<EOF {$str}efg EOF; ?>
foreach循环输出object对象的key和值：
<?php $arr = array("a"=>"aa", "b"=>"bb", "c"=>"cc"); foreach( $arr as $k => $val) { echo $k ."+"; echo $val. "\n"; } ?>
$GLOBALS['var'] 是外部的全局变量$var本身。
global $var 是外部$var的同名引用或者指针。（错误：是个别名引用而已，非指针！！！）
把字符串转化为base64编码：
<?php echo base64_encode("string"); ?>
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EOF
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