www.webdeveloper.com
Results 1 to 5 of 5

Thread: [RESOLVED] php eqautions

  1. #1
    Join Date
    Oct 2013
    Posts
    16

    resolved [RESOLVED] php eqautions

    Greetings so hear is my delema have a page that uses following

    <?php echo number_format($data['value']*0.0321507466*5*0.35, 2);?> where $data['value'] = 19.54 and outputs the result as 1.10 which is correct.

    how ever if i change it to say

    <?php echo number_format($data2['value']*0.0321507466*1.672*0.9, 2);?> and $data2['value'] = 1,291.30 the output is displaying 0.05 when it should be reading 62.47

    not sure why this is happening anyone have a idea as to why this would be? should the $data2['value'] = 1,291.30 not have a ' , ' in it and if so any clue how to get rid of it?

  2. #2
    Join Date
    Aug 2004
    Location
    Ankh-Morpork
    Posts
    22,326
    Yes, the comma will cause a problem, as PHP numeric types to not any commas. In this case, it's considered a string, and when it tries to type-cast it to a number, it only reads the first character (the "1"), then stops when it reaches anything that is not a number of a decimal point (the comma).

    You could get rid of any commas with a simple str_replace() call.
    "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

  3. #3
    Join Date
    Oct 2013
    Posts
    16
    Thanks so how would i work it into the code above. should i put it in the file that contains the code for $data['value']? just googled the function dont understand how it works.

  4. #4
    Join Date
    Feb 2014
    Location
    Canada
    Posts
    155
    You could do something like this just before you perform your calculations:

    PHP Code:
    if(strpos($data2['value'], ",") !== false) {
        
    $data2['value'] = (float) str_replace(","""$data2['value']);

    In words, it checks whether there is a comma anywhere in $data2['value'] and if so, it replaces it with "" (nothing). Since it's still technically a String, the result is then explictly casted to a float so you can use it for calculations. PHP probably will implicitly cast it for you but I like being specifying it.
    Last edited by Error404; 04-25-2014 at 07:29 AM.

  5. #5
    Join Date
    Aug 2004
    Location
    Ankh-Morpork
    Posts
    22,326
    If you don't want to mess with the source data and may need to use the "fixed" version in more than one place, you could create a separate variable:
    PHP Code:
    $data2Float = (float) str_replace(','''$data2['value']); 
    ...then use $data2Float in your calculation instead of $data2['value'].

    Alternatively, if that one calculation is the only place you use it, I'd probably just stick it in-line:
    PHP Code:
    <?php
    echo number_format(((float) str_replace(','''$data['value'])) * 0.0321507466 0.352);
    ?>
    "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)

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 0.12500 seconds
  • Memory Usage 2,886KB
  • Queries Executed 15 (?)
More Information
Template Usage (33):
  • (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
  • (3)bbcode_php
  • (1)footer
  • (1)forumjump
  • (1)forumrules
  • (1)gobutton
  • (1)header
  • (1)headinclude
  • (1)headinclude_bottom
  • (5)memberaction_dropdown
  • (1)navbar
  • (4)navbar_link
  • (1)navbar_moderation
  • (1)navbar_noticebit
  • (1)navbar_tabs
  • (2)option
  • (5)postbit
  • (5)postbit_onlinestatus
  • (5)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 (70):
  • 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_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