1.mkdir
<?php
mkdir("/path/to/my/dir", 0700);?>
Parameters
pathname- The directory path.
mode- The mode is 0777 by default, which means the widest possible access. For more information on modes, read the details on the chmod()page.
2. change directory
chdir
(PHP 4, PHP 5, PHP 7)
chdir — Change directory
Description ¶
bool chdir ( string
$directory )directory. 3. date()
date
(PHP 4, PHP 5, PHP 7)
date — Format a local time/date
Description ¶
string date ( string
$format [, int $timestamp = time() ] )
Returns a string formatted according to the given format string using the given integer
timestamp or the current time if no timestamp is given. In other words, timestamp is optional and defaults to the value of time().Parameters ¶
| Day | --- | --- |
| d | Day of the month, 2 digits with leading zeros | 01 to 31 |
| D | A textual representation of a day, three letters | Mon through Sun |
| j | Day of the month without leading zeros | 1 to 31 |
| l(lowercase 'L') | A full textual representation of the day of the week | Sunday throughSaturday |
| N | ISO-8601 numeric representation of the day of the week (added in PHP 5.1.0) | 1 (for Monday) through 7 (for Sunday) |
| S | English ordinal suffix for the day of the month, 2 characters | st, nd, rd or th. Works well with j |
| w | Numeric representation of the day of the week | 0 (for Sunday) through 6 (for Saturday) |
| z | The day of the year (starting from 0) |
| Week | --- | --- |
| W | ISO-8601 week number of year, weeks starting on Monday (added in PHP 4.1.0) |
| Month | --- | --- |
| F | A full textual representation of a month, such as January or March | January throughDecember |
| m | Numeric representation of a month, with leading zeros | 01 through 12 |
| M | A short textual representation of a month, three letters | Jan through Dec |
| n | Numeric representation of a month, without leading zeros | 1 through 12 |
| t | Number of days in the given month | 28 through 31 |
| Year | --- | --- |
| L | Whether it's a leap year | 1 if it is a leap year, 0 otherwise. |
| o | ISO-8601 year number. This has the same value as Y, except that if the ISO week number (W) belongs to the previous or next year, that year is used instead. (added in PHP 5.1.0) | Examples: 1999 or2003 |
| Y | A full numeric representation of a year, 4 digits | Examples: 1999 or2003 |
| y | A two digit representation of a year |
Example #1 date() examples
<?php// set the default timezone to use. Available since PHP 5.1date_default_timezone_set('UTC');// Prints something like: Mondayecho date("l");// Prints something like: Monday 8th of August 2005 03:12:46 PMecho date('l jS \of F Y h:i:s A');// Prints: July 1, 2000 is on a Saturdayecho "July 1, 2000 is on a " . date("l", mktime(0, 0, 0, 7, 1, 2000));/* use the constants in the format parameter */
// prints something like: Wed, 25 Sep 2013 15:28:57 -0700echo date(DATE_RFC2822);// prints something like: 2000-07-01T00:00:00+00:00echo date(DATE_ATOM, mktime(0, 0, 0, 7, 1, 2000));
// month_date echo date("md");
?>file_exists
(PHP 4, PHP 5, PHP 7)
file_exists — Checks whether a file or directory exists
Parameters ¶
filename- Path to the file or directory.On windows, use //computername/share/filename or \\computername\share\filename to check files on network shares.
Return Values ¶
Returns
TRUE if the file or directory specified by filename exists; FALSE otherwise.Examples ¶
Example #1 Testing whether a file exists
<?php
$filename = '/path/to/foo.txt';
if (file_exists($filename)) {
echo "The file $filename exists";
} else {
echo "The file $filename does not exist";
}?>4. 字串傳送....
example 1: 在html5 裡面要用 php 定義好的 str
原來是
<img src="out00.jpg" id = out00 />
如果要把 out00.jpg 改成在php 裡面定義好的檔案名...可以改成下面的語法
<img src=<?php echo "./jpeg/" . date("md") . "/" . $_SESSION['file_id'] . "_out00.jpg"; ?> id = out00 />使用 <?php echo $string ?>
example 2: 在javascript 裡面要用 php 定義好的 str
<script>
var filename_out00 = "<?php echo "./jpeg/" . date("md") . "/" . $_SESSION['file_id'] . "_out00.jpg"; ?>"; </script>
其實跟example 2很像....但是多了 ""
沒有留言:
張貼留言