www.webdeveloper.com
Results 1 to 7 of 7

Thread: parsing selected non sequential columns from csv

  1. #1
    Join Date
    Oct 2015
    Posts
    3

    parsing selected non sequential columns from csv

    I am very newbie to php.I am upto parse the csv file and want to copy selected columns to other csv file, which are not sequential. I have read data from csv file in multidimentional array. so I have all key value pairs, where keys are name of columns and values are the data from csv file. I am using

    foreach($contents as $line) {
    $line = preg_replace( "/\r|\n/", "", $line );
    $line_array = explode(",",$line);
    if($i==0)
    {
    foreach($line_array as $key=>$val)
    {
    $csv_heading[$key] = trim($val);
    }
    }
    else
    {
    foreach($line_array as $key=>$val)
    {
    $csv_array[$i][$csv_heading[$key]] = $val;
    }
    }
    $i++;
    }
    $len = count($csv_array);
    $row = array();
    for($col = 0 ; $col < $len ; $col++)
    {
    if(array_intersect_key($col , $picked))
    $row[] = $csv_array[$col];
    $final = $row;
    print_r($row);
    }

    and my csv file contains records like

    name,city,state,country
    Dave,mumbai,maharashtra,India

    and so on. from the csv file I want to copy the columns name and city to other csv. can anyone help me? Thanks in advance.

  2. #2
    Join Date
    Oct 2015
    Posts
    3
    No help??

  3. #3
    Join Date
    Jul 2013
    Location
    Voorheesville NY USA
    Posts
    1,900
    Not a very clear explanation of your dilemma. Have to wonder why one would want to move data from one csv file to another one instead of making a more-usable database table out of it.

    Am I understanding you in that your csv is a set of column names and their values? That is what it appears to be, which is an unusual csv format.

    Perhaps you could post a sample of ONE row of your csv and ONE row of your desired csv files, IF that is really your best alternative.
    JG
    PS - If you're posting here you should be using:

    error_reporting(E_ALL);
    ini_set('display_errors', '1');


    at the top of ALL php code while you develop it!

  4. #4
    Join Date
    Aug 2004
    Location
    Ankh-Morpork
    Posts
    22,326
    It would be simpler and more memory efficient (PHP arrays are memory hogs) to just read from one file and write to the other, line by line:
    PHP Code:
    $fhIn fopen('path/to/source_file.csv''r');
    $fhOut fopen('path/to/output.csv''w'); // should do some error-checking for both of these!

    while(($row fgetcsv($fhIn)) != false) {
        
    fputcsv($fhOutarray_slice($row(02));
    }

    fclose($fhIn);
    fclose($fhOut); 
    "Well done....Consciousness to sarcasm in five seconds!" ~ Terry Pratchett, Night Watch

    How to Ask Questions the Smart Way (not affiliated with this site, but well worth reading)

    My Blog
    cwrBlog: simple, no-database PHP blogging framework

  5. #5
    Join Date
    Oct 2015
    Posts
    3
    thanx for ur reply @ginerjm.
    I have requirment dat is only why i want to copy in diff csv.


    thanx for ur reply @NogDog.
    but array_slice works horizontly.not vertically.I want columns to be copied.

  6. #6
    Join Date
    Jul 2013
    Location
    Voorheesville NY USA
    Posts
    1,900
    Good luck with this cause you're not making much sense.
    JG
    PS - If you're posting here you should be using:

    error_reporting(E_ALL);
    ini_set('display_errors', '1');


    at the top of ALL php code while you develop it!

  7. #7
    Join Date
    Aug 2004
    Location
    Ankh-Morpork
    Posts
    22,326
    Quote Originally Posted by newbiePHP View Post
    thanx for ur reply @ginerjm.
    I have requirment dat is only why i want to copy in diff csv.


    thanx for ur reply @NogDog.
    but array_slice works horizontly.not vertically.I want columns to be copied.
    Afraid I don't understand what you're trying to do, then (or I do, but you don't understand my code ). What I suggested would read this:
    Code:
    11,12,13,14
    21,22,23,24
    31,32,33,34
    ...and output this:
    Code:
    11,12
    21,22
    31,32
    If it should do something else, then it might help to provide a similarly brief example of input and expected output.
    "Well done....Consciousness to sarcasm in five seconds!" ~ Terry Pratchett, Night Watch

    How to Ask Questions the Smart Way (not affiliated with this site, but well worth reading)

    My Blog
    cwrBlog: simple, no-database PHP blogging framework

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
HTML5 Development Center

"

"

X vBulletin 4.2.2 Debug Information

  • Page Generation 0.14012 seconds
  • Memory Usage 2,919KB
  • Queries Executed 15 (?)
More Information
Template Usage (35):
  • (1)SHOWTHREAD
  • (1)ad_footer_end
  • (1)ad_footer_start
  • (1)ad_global_above_footer
  • (1)ad_global_below_navbar
  • (1)ad_global_header1
  • (1)ad_global_header2
  • (1)ad_navbar_below
  • (1)ad_showthread_firstpost_sig
  • (1)ad_showthread_firstpost_start
  • (1)ad_thread_first_post_content
  • (1)ad_thread_last_post_content
  • (2)bbcode_code
  • (1)bbcode_php
  • (1)bbcode_quote
  • (1)footer
  • (1)forumjump
  • (1)forumrules
  • (1)gobutton
  • (1)header
  • (1)headinclude
  • (1)headinclude_bottom
  • (7)memberaction_dropdown
  • (1)navbar
  • (4)navbar_link
  • (1)navbar_moderation
  • (1)navbar_noticebit
  • (1)navbar_tabs
  • (2)option
  • (7)postbit
  • (7)postbit_onlinestatus
  • (7)postbit_wrapper
  • (1)spacer_close
  • (1)spacer_open
  • (1)tagbit_wrapper 

Phrase Groups Available (6):
  • global
  • inlinemod
  • postbit
  • posting
  • reputationlevel
  • showthread
Included Files (26):
  • ./showthread.php
  • ./global.php
  • ./includes/class_bootstrap.php
  • ./includes/init.php
  • ./includes/class_core.php
  • ./includes/config.php
  • ./includes/functions.php
  • ./includes/functions_navigation.php
  • ./includes/class_friendly_url.php
  • ./includes/class_hook.php
  • ./includes/class_bootstrap_framework.php
  • ./vb/vb.php
  • ./vb/phrase.php
  • ./includes/functions_facebook.php
  • ./includes/functions_calendar.php
  • ./includes/functions_bigthree.php
  • ./includes/class_postbit.php
  • ./includes/class_bbcode.php
  • ./includes/functions_reputation.php
  • ./includes/functions_notice.php
  • ./packages/vbattach/attach.php
  • ./vb/types.php
  • ./vb/cache.php
  • ./vb/cache/db.php
  • ./vb/cache/observer/db.php
  • ./vb/cache/observer.php 

Hooks Called (71):
  • init_startup
  • friendlyurl_resolve_class
  • init_startup_session_setup_start
  • database_pre_fetch_array
  • database_post_fetch_array
  • init_startup_session_setup_complete
  • global_bootstrap_init_start
  • global_bootstrap_init_complete
  • cache_permissions
  • fetch_threadinfo_query
  • fetch_threadinfo
  • fetch_foruminfo
  • load_show_variables
  • load_forum_show_variables
  • global_state_check
  • global_bootstrap_complete
  • global_start
  • style_fetch
  • global_setup_complete
  • showthread_start
  • showthread_getinfo
  • strip_bbcode
  • friendlyurl_clean_fragment
  • friendlyurl_geturl
  • forumjump
  • cache_templates
  • cache_templates_process
  • template_register_var
  • template_render_output
  • fetch_template_start
  • fetch_template_complete
  • parse_templates
  • fetch_musername
  • notices_check_start
  • notices_noticebit
  • process_templates_complete
  • friendlyurl_redirect_canonical
  • showthread_post_start
  • showthread_query_postids
  • showthread_query
  • bbcode_fetch_tags
  • bbcode_create
  • showthread_postbit_create
  • postbit_factory
  • postbit_display_start
  • postbit_imicons
  • bbcode_parse_start
  • bbcode_parse_complete_precache
  • bbcode_parse_complete
  • postbit_display_complete
  • memberaction_dropdown
  • tag_fetchbit
  • tag_fetchbit_complete
  • forumrules
  • navbits
  • navbits_complete
  • build_navigation_data
  • build_navigation_array
  • check_navigation_permission
  • process_navigation_links_start
  • process_navigation_links_complete
  • set_navigation_menu_element
  • build_navigation_menudata
  • build_navigation_listdata
  • build_navigation_list
  • set_navigation_tab_main
  • set_navigation_tab_fallback
  • navigation_tab_complete
  • fb_like_button
  • showthread_complete
  • page_templates