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WordCamp 2010 The WordPress Loop
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WordCamp 2010 The WordPress Loop

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Learn about custom queries, template tags, and more!

Learn about custom queries, template tags, and more!

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  • Transcript

    • 1. THE LOOP JAKE SPURLOCK @WHYISJAKE JAKESPURLOCK.COM
    • 2. DEVELOPERS IN THE HOUSE?
    • 3. OVERVIEW INTRODUCE THE LOOP BASIC TEMPLATE TAGS CUSTOM QUERIES MULTIPLE LOOPS PAGE CUSTOM POST TYPES
    • 4. GET STARTED... WHY NOT JUST LOOK AT CODE EH?
    • 5. SIMPLEST INDEX PAGE <?PHP IF (HAVE_POSTS()) : WHILE (HAVE_POSTS()) : THE_POST(); THE_CONTENT(); ENDWHILE; ENDIF; ?>
    • 6. TEMPLATE TAGS .:THE BREAD AND BUTTER OF THEME DESIGNERS:.
    • 7. TEMPLATE TAGS THE_CONTENT() THE_META(); THE_TITLE() THE_ID() THE_PERMALINK() THE_POST_THUMBNAIL() THE_CATEGORY() THE_AUTHOR() THE_TAGS() THE_SHORTLINK() THE_DATE() EDIT_POST_LINK() CODEX.WORDPRESS.ORG/TEMPLATE_TAGS THE_EXCERPT()
    • 8. CUSTOM QUERIES
    • 9. QUERY_POSTS VS. GET_POSTS
    • 10. QUERY_POSTS WHEN YOU WANT TO CHANGE THE MAIN LOOP EXCLUDE CATEGORIES FROM MAIN LOOP SHOW POSTS FROM ONLY ONE CATEGORY.
    • 11. IMPORTANT NOTE THE QUERY_POSTS FUNCTION IS INTENDED TO BE USED TO MODIFY THE MAIN PAGE LOOP ONLY. IT IS NOT INTENDED AS A MEANS TO CREATE SECONDARY LOOPS ON THE PAGE. IF YOU WANT TO CREATE SEPARATE LOOPS OUTSIDE OF THE MAIN ONE, YOU SHOULD USE GET_POSTS() INSTEAD. USE OF QUERY_POSTS ON LOOPS OTHER THAN THE MAIN ONE CAN RESULT IN YOUR MAIN LOOP BECOMING INCORRECT AND POSSIBLY DISPLAYING THINGS THAT YOU WERE NOT EXPECTING. THE QUERY_POSTS FUNCTION OVERRIDES AND REPLACES THE MAIN QUERY FOR THE PAGE. TO SAVE YOUR SANITY, DO NOT USE IT FOR ANY OTHER PURPOSE.
    • 12. <?php //The
Query query_posts('posts_per_page=5'); //The
Loop if
(
have_posts()
)
:
while
(
have_posts()
)
:
 the_post(); 
.. endwhile;
else: 
.. endif; //Reset
Query wp_reset_query(); ?>
    • 13. CUSTOM POST TYPES?
    • 14. QUERY_POSTS WITH CUSTOM POST TYPES QUERY_POSTS( 'POST_TYPE=NAME 0F POST TYPE'); QUERY_POSTS(ARRAY('POST_TYPE' => ARRAY('POST', 'MOVIES')));
    • 15. PLUGIN? ADD_FILTER( 'PRE_GET_POSTS', 'MY_GET_POSTS' ); FUNCTION MY_GET_POSTS( $QUERY ) { ! IF ( IS_HOME() && FALSE == $QUERY- >QUERY_VARS['SUPPRESS_FILTERS'] ) ! ! $QUERY->SET( 'POST_TYPE', ARRAY( 'POST', 'PAGE', 'ALBUM', 'MOVIE', 'QUOTE', 'ATTACHMENT' ) ); ! RETURN $QUERY; } VIA
JUSTIN
TADLOCK
    • 16. THE LOOP JAKE SPURLOCK @WHYISJAKE JAKESPURLOCK.COM

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