php实用功能小记

function fun(){
    $args = func_get_args();
    foreach ($args as $k => $v) {
        echo "arg".($k+1).":";
        var_dump($v);
        echo "<br>";
    }
}
fun();

echo "<hr>";
fun(11,‘22‘,[22,33]);
echo "<hr>";

$files = glob(‘*.php‘);
var_dump($files);

$files = glob(‘*.{php,html}‘, GLOB_BRACE);
print_r($files);

$files = glob(‘../*.{php,html}‘, GLOB_BRACE);
print_r($files);

$files = glob(‘../*.{php,html}‘, GLOB_BRACE);
$files = array_map(‘realpath‘,$files);
print_r($files);

echo "Initial: ".memory_get_usage()." bytes <br>";
// 使用内存
for ($i = 0; $i < 100000; $i++) {
    $array []= md5($i);
}
echo "center: ".memory_get_usage()." bytes <br>";
// 删除一半的内存
for ($i = 0; $i < 100000; $i++) {
    unset($array[$i]);
}
echo "Final: ".memory_get_usage()." bytes <br>";
echo "Peak: ".memory_get_peak_usage()." bytes <br>";

print_r(getrusage());

for($i=0;$i<10000000;$i++) {

}
$data = getrusage();
echo "User time: ".($data[‘ru_utime.tv_sec‘] +$data[‘ru_utime.tv_usec‘] / 1000000);
echo "<br>";
echo "System time: ".($data[‘ru_stime.tv_sec‘] +$data[‘ru_stime.tv_usec‘] / 1000000);

print_r( "Line ".__LINE__);

echo uniqid()."<br>";
echo uniqid(‘XYZ_‘)."<br>";
echo uniqid(‘‘,true)."<br>";
echo uniqid(‘XYZ_‘,true)."<br>";

$old = [
    ‘abc‘,
    [1,‘xx‘],
    ‘111‘
];
$string = serialize($old);
print_r($string);
echo "<br>";
$new = unserialize($string);
print_r($new);

$old = [
    ‘abc‘,
    [1,‘xx‘],
    ‘111‘
];
$string = json_encode($old);
print_r($string);
echo "<br>";
$new = json_decode($string);
print_r($new);

$string =
"Aspose.Slides for Java can be used with any kind of application either it‘s a Web or Desktop Application. Moreover, Aspose.Slides for Java also provides fully featured demos and working examples for developers to have a better understanding of the API.
Aspose.Slides for Java can not only open PowerPoint files from different sources, but it also allows you to save your presentations in a variety of ways. For example, you can save your presentation in not only PPT. Moreover, you can also save your slides as images. Aspose.Slides for Java gives you almost all those features that you may or may not find in Microsoft PowerPoint. The versatility of Aspose.Slides for Java is that you can not only add tables and different kinds of shapes to your slides, but also different kinds of frames (that is text, audio and video frames).";
// 压缩
$compressed = gzcompress($string);
echo "Original size: ". strlen($string)."<br>";
echo "Compressed size: ". strlen($compressed)."<br>";
// 解压缩
$original = gzuncompress($compressed);

$string =
"Aspose.Slides for Java can be used with any kind of application either it‘s a Web or Desktop Application. Moreover, Aspose.Slides for Java also provides fully featured demos and working examples for developers to have a better understanding of the API.
Aspose.Slides for Java can not only open PowerPoint files from different sources, but it also allows you to save your presentations in a variety of ways. For example, you can save your presentation in not only PPT. Moreover, you can also save your slides as images. Aspose.Slides for Java gives you almost all those features that you may or may not find in Microsoft PowerPoint. The versatility of Aspose.Slides for Java is that you can not only add tables and different kinds of shapes to your slides, but also different kinds of frames (that is text, audio and video frames).";
// 压缩
$compressed = gzdeflate($string);
echo "Original size: ". strlen($string)."<br>";
echo "Compressed size: ". strlen($compressed)."<br>";
// 解压缩
$original = gzinflate($compressed);

$string =
"Aspose.Slides for Java can be used with any kind of application either it‘s a Web or Desktop Application. Moreover, Aspose.Slides for Java also provides fully featured demos and working examples for developers to have a better understanding of the API.
Aspose.Slides for Java can not only open PowerPoint files from different sources, but it also allows you to save your presentations in a variety of ways. For example, you can save your presentation in not only PPT. Moreover, you can also save your slides as images. Aspose.Slides for Java gives you almost all those features that you may or may not find in Microsoft PowerPoint. The versatility of Aspose.Slides for Java is that you can not only add tables and different kinds of shapes to your slides, but also different kinds of frames (that is text, audio and video frames).";
// 压缩
$compressed = gzencode($string);
echo "Original size: ". strlen($string)."<br>";
echo "Compressed size: ". strlen($compressed)."<br>";
// 解压缩
$original = gzdecode($compressed);

$string =
"As an example, with traditional programming, the main function of an application might make function calls into a menu library to display a list of available commands and query the user to select one.[4] The library thus would return the chosen option as the value of the function call, and the main function uses this value to execute the associated command. This style was common in text based interfaces. For example, an email client may show a screen with commands to load new mail, answer the current mail, start a new mail, etc., and the program execution would block until the user presses a key to select a command.
With inversion of control, on the other hand, the program would be written using a software framework that knows common behavioral and graphical elements, such as windowing systems, menus, controlling the mouse, and so on. The custom code ‘fills in the blanks‘ for the framework, such as supplying a table of menu items and registering a code subroutine for each item, but it is the framework that monitors the user‘s actions and invokes the subroutine when a menu item is selected. In the mail client example, the framework could follow both the keyboard and mouse inputs and call the command invoked by the user by either means, and at the same time monitor the network interface to find out if new messages arrive and refresh the screen when some network activity is detected. The same framework could be used as the skeleton for a spreadsheet program or a text editor. Conversely, the framework knows nothing about Web browsers, spreadsheets or text editors; implementing their functionality takes custom code.
Inversion of control carries the strong connotation that the reusable code and the problem-specific code are developed independently even though they operate together in an application. Software frameworks, callbacks, schedulers, event loops, dependency injection, and the template method are examples of design patterns that follow the inversion of control principle, although the term is most commonly used in the context of object-oriented programming.";
echo "Original size: ". strlen($string)."<br>";
$gzcompress = gzdeflate($string);
echo "gzcompress Compressed size: ". strlen($gzcompress)."<br>";$gzdeflate =  gzdeflate($string);
echo "gzdeflate Compressed size: ". strlen($gzdeflate)."<br>";$gzencode = gzencode($string);
echo "gzencode Compressed size: ". strlen($gzencode)."<br>";

$clean = false;
function shutdown_func()
{
    global $clean;
    if (!$clean) {
        die("not a clean shutdown");
    }
    return false;
}
$a     = 1;
$a     = new FooClass(); // 将因为致命错误而失败
$clean = true;

<?php

$clean = false;
function shutdown_func()
{
    global $clean;
    if (!$clean) {
        die("not a clean shutdown");
    }
    return false;
}
register_shutdown_function("shutdown_func");
$a     = 1;
$a     = new FooClass(); // 将因为致命错误而失败
$clean = true;