dlite922 1,584
Recognized Expert Top Contributor
Hey guys,
I need to maintain short list of messages in a text log file. I was just googling for the best way to delete the first or last line and insert a new one.
Basically with each access I'll delete a line from the top (or bottom could work too) and insert a new line at the other end. (so it scrolls basically)
If your curious, this is the status of a daily cron job, I basically want to know the status up to the last 10 days.
I'm not asking for code, but something pretty light. (ie if I decided i wanted 100 or 300 lines). Most of you know my PHP skills and know I can just put it in an array and rewrite to the file after I'm done, but
can this be done in two lines of code and accessing the file resource only once (ie one file handle).
hope that makes enough sense, I'll post the code once I have something,
Thanks
Dan
3 1800 hsriat 1,654
Recognized Expert Top Contributor
I could not understand the requirements completely, but I would suggest this solution. I hope it matches your requirements. - file_put_contents(
-
$file_name,
-
preg_replace(
-
"/^[^\n]+\n/",
-
"",
-
file_get_contents($file_name).$new_line
-
)
-
);
If I didn't get it right, let me know.
Cheers.
get all your file contents to an array. if you want to skip line 1, print array starting from element 2. (or use array_pop). the manual documents array functions so check the manual.
Markus 6,050
Recognized Expert Expert
Obviously storing the messages at the bottom makes more sense and, in my head, seems easier to edit.
You can use file() to return the lines of a file into an array.
Let us know how you get along with this, Dan.
- mark.
Sign in to post your reply or Sign up for a free account.
Similar topics |
by: Ling Lee |
last post by:
Hi all.
I'm trying to write a program that:
1) Ask me what file I want to count number of lines in, and then counts the
lines and writes the answear out.
2) I made the first part like this:
in_file = raw_input("What is the name of the file you want to open: ")
in_file = open("test.txt","r")
|
by: ross |
last post by:
I want to do some tricky text file manipulation on many files, but have
only a little programming knowledge.
What are the ideal languages for the following examples?
1. Starting from a certain folder, look in the subfolders for all
filenames matching *FOOD*.txt Any files matching in each folder should
be copied to a new subfolder within the current folder called EATING
with a new name of *FOOD*COPY.txt
|
by: Wade G. Pemberton |
last post by:
Help!:
I use javascript to format repetitive data from a web page input FORM
into a long string , and save it as lines of comma delimited data in a
text file on a Unix server. The text file is meant to be downloaded
to MS Excel on the users' computers. Several such files will be
downloaded and appended into the Excel file. Problem: The text file
looks good when viewed offline by any text reader, but Excel will not
import it...
|
by: Chris |
last post by:
Hi
I can use a text file as a datasource but am unable to get the datatable to
see the text file as having multiple columns. Everything gets
put into the first column in the datatable. Sample of code and text file
included.
Please help
Regards
|
by: MLH |
last post by:
Am trying to import 20,000+ lines of text in a file
FTP'd from a UNIX platform to windows via FTP
session in a DOS box. About 2000 records have
multiple lines in them separated by CRLF's.
That's not the idea. Each line was supposed to
be a separate record. I don't know why the 2000
records having MULTIPLE lines of text are so
stubborn. I've run UNIX2DOS utility against the
raw text file - no help. I know that UNIX and MAC
| |
by: DH |
last post by:
Hi,
I'm trying to strip the html and other useless junk from a html page..
Id like to create something like an automated text editor, where it
takes the keywords from a txt file and removes them from the html page
(replace the words in the html page with blank space) I'm new to python
and could use a little push in the right direction, any ideas on how to
implement this?
Thanks!
|
by: ivan.perak |
last post by:
Hello,
im a beginner in VB.NET... The thing i would like to do is as it
follows....
I have a text file (list of names, every name to the next line) which
is about 350000 lines long. I would like to split it and create a new
file at every lets say 20000 lines... so, the directory output would
have to be something like this:
|
by: peraklo |
last post by:
Hello,
there is another problem i am facing. i have a text file which is
about 15000 lines big. i have to cut the last 27 lines from that file
and create a new text file that contans those 27 lines. and after that
save both of those files... since that is a big block of text (15000
lines) i thint that it is a big job to look for a keyword... so my
question is this exactly:
how do i do this:
|
by: =?Utf-8?B?QnJpYW4gQ29vaw==?= |
last post by:
I want to open a text file and format it into a specific line and then apply
color to a specific location of the text and then display it in a RichTextBox
after all of this is done.
I can do all of the above after the file is loaded into the RichTextBox, and
I am trying to speed the process up by doing it in a temp file.
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
| |
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
| |
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
| |