php에서 문자열을 치환해주는 함수가 있다.
str_place()함수인데 아래와 같이 사용하면 된다
str_replace("치환할 문자", "치환될 문자", "대상 문자열")
예) article변수에서 "<b>"라는 내용을 ""로 대체한다. 즉, "<b>"내용을 찾아 지우라는 것과 같다.
$tmp = str_replace("<b>", "", "$article")
| Python 파이썬 한글주석 오류날때 (0) | 2014.06.08 |
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| IOS(아이폰,아이패드) UX 프레임 다운로드 (0) | 2014.04.16 |
| [php] file_get_contents() 함수 대체하기 (0) | 2013.08.12 |
| PHP 수행시간 측정 (0) | 2013.08.11 |
| [Android] 화면 꺼짐 방지 소스 (0) | 2013.06.27 |
file_get_contents 함수는 서버 보안상 off되있는곳이 많다.
이 함수를 curl를 이용하여 대체가능하다.
세부 링크 :http://www.partner114.com/bbs/board.php?bo_table=B07&wr_id=126
<?php
function curl($url) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$g = curl_exec($ch);
curl_close($ch);
return $g;
}
?>
위와 같이 별도의 함수를 파일로 만들어서 include해서 사용할수 있다.
| IOS(아이폰,아이패드) UX 프레임 다운로드 (0) | 2014.04.16 |
|---|---|
| [PHP] 문자열 치환,제거하기(str_place) (0) | 2013.08.17 |
| PHP 수행시간 측정 (0) | 2013.08.11 |
| [Android] 화면 꺼짐 방지 소스 (0) | 2013.06.27 |
| 라즈베리파이에 tightvnc server 설치 및 설정 (0) | 2013.06.01 |
Link : http://jmnote.com/wiki/PHP_%EC%88%98%ED%96%89%EC%8B%9C%EA%B0%84_%EC%B8%A1%EC%A0%95
<!DOCTYPE html> <meta charset="utf-8" /> <?php function get_time() { list($usec, $sec) = explode(" ", microtime()); return ((float)$usec + (float)$sec); } $start = get_time(); /* 수행할 내용 */ $end = get_time(); $time = $end - $start; echo '<br/>'.$time.'초 걸림';?>
| [PHP] 문자열 치환,제거하기(str_place) (0) | 2013.08.17 |
|---|---|
| [php] file_get_contents() 함수 대체하기 (0) | 2013.08.12 |
| [Android] 화면 꺼짐 방지 소스 (0) | 2013.06.27 |
| 라즈베리파이에 tightvnc server 설치 및 설정 (0) | 2013.06.01 |
| Using PWM in RPi.GPIO (0) | 2013.05.28 |
안드로이드 앱 개발시 화면이 꺼지는것을 방지해야하는 때가 있다.
그럴 경우 다음과 같이 한다.
import android.view.WindowManager;
그리고 onCreate 메소드 안에 아래를 추가한다.
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
| [php] file_get_contents() 함수 대체하기 (0) | 2013.08.12 |
|---|---|
| PHP 수행시간 측정 (0) | 2013.08.11 |
| 라즈베리파이에 tightvnc server 설치 및 설정 (0) | 2013.06.01 |
| Using PWM in RPi.GPIO (0) | 2013.05.28 |
| [소스]라즈베리파이 서보모터 컨트롤하기 (0) | 2013.05.28 |
참고 URL : http://elinux.org/RPi_VNC_Server
Sometimes it is not convenient to work directly on the Raspberry Pi. Maybe you would like to work on it but from another computer by remote control. You can do this and the remote computer can even be anywhere in the world over the internet. This tutorial shows how you can view and control the raspberry pi desktop from your computer's desktop by using special software.
This project does not require any coding or compilation. Very basic Linux and networking knowledge would be useful, but not essential.
You need to...
The commands described below start a "virtual" graphical session. Instead of using a hardware framebuffer, this uses RAM for a framebuffer. It also opens a network channel or port that allows programs on other computers (if they provide the password) to show the framebuffer and provide mouse and keyboard events.
This way you can run a desktop session on the raspberry pi, but display and control it elsewhere.
Because the framebuffer isn't the real framebuffer you cannot take advantage of the GPU to accelerate operations on the screen.
You need to
Log in to your Pi and install the Tight VNC Package
$ sudo apt-get install tightvncserver
Next Run TightVNC Server which will prompt you to enter a Password and an optional View Only Password
$ tightvncserver
Once that is done you can start a VNC server from the shell prompt. This example starts a session on VNC display zero (:0) with full HD resolution:
$ vncserver :0 -geometry 1920x1080 -depth 24
(If fonts appear the wrong size, add '-dpi 96' to the end.) Or you could create a script to save typing in the whole thing.
$ nano svnc.sh (call the file whatever you like)
Add the lines:
#!/bin/sh vncserver :0 -geometry 1920x1080 -depth 24 -dpi 96
Ctrl-x y <return> (To Exit Nano and Save)
Set the file to Execute
$ chmod +x svnc.sh
then to run
$ ./svnc.sh
Run at boot.
Start a root session
sudo bash
Create a file in /etc/init.d with a suitable name such as vncboot with the following content.
### BEGIN INIT INFO
# Provides: vncboot
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start VNC Server at boot time
# Description: Start VNC Server at boot time.
### END INIT INFO
#! /bin/sh
# /etc/init.d/vncboot
USER=root
HOME=/root
export USER HOME
case "$1" in
start)
echo "Starting VNC Server"
#Insert your favoured settings for a VNC session
/usr/bin/vncserver :0 -geometry 1280x800 -depth 16 -pixelformat rgb565
;;
stop)
echo "Stopping VNC Server"
/usr/bin/vncserver -kill :0
;;
*)
echo "Usage: /etc/init.d/vncboot {start|stop}"
exit 1
;;
esac
exit 0
Modify the file permissions so it can be executed
chmod 755 /etc/init.d/vncboot
Enable dependency based boot sequencing
update-rc.d /etc/init.d/vncboot defaults
If enabling dependency based boot sequencing was successful, it says
update-rc.d: using dependency based boot sequencing
But if it says
update-rc.d: error: unable to read /etc/init.d//etc/init.d/vncboot
then try the following command
update-rc.d vncboot defaults
Reboot your Raspberry PI and you should find a vncserver already started.
Install Tight VNC on your desktop from the link below or most VNC clients work I believe.
http://www.tightvnc.com/download.php
Or install it using your package manager. The following works on my ubuntu 11.10 workstation
sudo apt-get install xtightvncviewer
Then use <Your Pi IP>:1 (e.g. 192.168.1.2:1) as the host name when connecting.[1]
Works Great, select full screen from the tool bar and a full 1080p 24bit desktop is yours from anywhere.
Instead of using the script in the Raspberry Pi wiki, use this one provided by "PenguinTutor":
#!/bin/sh # /etc/init.d/tightvncserver # Customised by Stewart Watkiss #http://www.penguintutor.com/linux/tightvnc # Set the VNCUSER variable to the name of the user to start tightvncserver under VNCUSER='pi' eval cd ~$VNCUSER case "$1" in start) su $VNCUSER -c '/usr/bin/tightvncserver :1' echo "Starting TightVNC server for $VNCUSER " ;; stop) pkill Xtightvnc echo "Tightvncserver stopped" ;; *) echo "Usage: /etc/init.d/tightvncserver {start|stop}" exit 1 ;; esac exit 0
Now, change the VNCUSER=pi to your desired username, so for example: VNCUSER=jsmith
That'll make it boot on the username of which you want it to boot on... but I then received the grey screen error when remotely accessing the Pi from my computer, now the way you fix this is, open up the xstartup file that was created when VNCSERVER executes on your desired username. Now the way you access it and edit it is by:
sudo nano .vnc/xstartup
.vnc is usually in the home directory.
Delete everything that is in xstartup (or not in as mine was), and add this:
!/bin/sh xrdb $HOME/.Xresources xsetroot -solid black /usr/bin/lxsession -s LXDE &
Now it should work.
You'll often find yourself in a position where VNC will start, but you'll get things such as multiple virtual desktops appearing, and you try to save it in the "Openbox Configuration Manager," and they go away for a second, but then you find you'll restart the Pi and then they appear again. Here's how to fix it:
Create, or edit the current autostart.sh file which is located in:
.config/openbox/autostart.sh
Edit using "Nano" or any other text editor, I use Nano as it is the most comfortable for me, so do:
sudo nano .config/openbox/autostart.sh/
Add the line: exec openbox-session
Now add the line exec openbox-session again in .vnc/xstartup and now it should work.
But you can't really save the setting in Openbox Configuration Manager on VNC, but you have to do it manually; so you open this file:
nano .config/openbox/lxde-rc.xml
Scroll down to: <desktops>
You should see a bunch of stuff there, but only focus on this: <number>6</number> or something similar.
Change the number of desktops you want within the <number></number> bit.
I changed mine to 1, because that's all I want.
It should now work!
In this example TightVNC has been used. This is a popular and relatively friendly program that uses the VNC protocols and is included in most GNU/Linux distributions. However it does have it's limitations. The biggest of these is that it creates new desktops for each connection. It may be that what you want to do though is view and control the same desktop that shows on the monitor/TV plugged into the Raspberry Pi. To do this a better tool to use is x11vnc. This is more powerful but less easy to use. However if you already have a desktop running it will latch on to it and share it as a default. This too is fairly popular and included in many GNU/Linux distribution repositories such as Raspbian.
Be aware that basic VNC is not secure. It is not encrypted unless you are advanced in setting it up. If you use it over the internet it can result in criminals "bouncing" you off your connection and taking over. There are even computer robot tools that try to do this. You must set a password but even then it is sometimes possible to take over someone's connection after they have entered it. A good tip is to set the server to shift from the default port 5900 to something else chosen randomly as long as it is spare.
| PHP 수행시간 측정 (0) | 2013.08.11 |
|---|---|
| [Android] 화면 꺼짐 방지 소스 (0) | 2013.06.27 |
| Using PWM in RPi.GPIO (0) | 2013.05.28 |
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import time
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BOARD)
GPIO.setup(12, GPIO.OUT)
p = GPIO.PWM(12, 50) # channel=12 frequency=50Hz
p.start(0)
try:
while 1:
for dc in range(0, 101, 5):
p.ChangeDutyCycle(dc)
time.sleep(0.1)
for dc in range(100, -1, -5):
p.ChangeDutyCycle(dc)
time.sleep(0.1)
except KeyboardInterrupt:
pass
p.stop()
GPIO.cleanup()
| [Android] 화면 꺼짐 방지 소스 (0) | 2013.06.27 |
|---|---|
| 라즈베리파이에 tightvnc server 설치 및 설정 (0) | 2013.06.01 |
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