What’s the internal concatenation function for creating Excerpts with WordPress?

Use wp_trim_words( $text, $num_words, $more_text )

The first argument is the text to trim, the second is the number of words you want and the third is the truncation text which defaults to an ellipsis.

The function is located in wp-includes/formatting.php line 1920 (v3.3.1)

Related Posts:

  1. Using wp_trim_excerpt to get the_excerpt() outside the loop
  2. apply_filters() and the_excerpt are giving unexpected results
  3. Compare the_excerpt() to the_content()
  4. How to include line-breaks in the_excerpt?
  5. How to get the unfiltered excerpt, without […] or auto-excerpting
  6. Remove “Continue Reading” Link From the Teaser Excerpt Only
  7. Display Links in Excerpts?
  8. Modify youtube video size on one page and show another size on different page
  9. Read more tag shows up on EVERY post
  10. Issue with enabling formatting in excerpts in WordPress
  11. limit the words in the post content and add read more link
  12. Excerpt Word Count
  13. Limit the_excerpt in the first point (.) of the sentence
  14. How to show only manual / custom excerpts?
  15. Excerpts that don’t truncate words
  16. Spacing within the excerpt
  17. “Read more” link doesn’t show up when the post length is under the excerpt length
  18. the_excerpt Read More Filter
  19. How to get the excerpts of all children pages
  20. Custom excerpt showing first paragraph (with HTML formatting)
  21. Regenerate auto excerpts after updating many posts
  22. Empty excerpt using wp_get_recent_posts
  23. Remove whitespace before the_excerpt();
  24. Different ‘read more’ links
  25. The excerpt: Display text OR image OR video
  26. How to display only the excerpt in the blog/posts page with Gutenberg?
  27. Bulk add tag (or any sort of label) to posts who have custom excerpt
  28. How to correctly limit the content and strip HTML?
  29. How to display links in excerpt? [duplicate]
  30. Writing a custom excerpt function
  31. Getting first 20 words without excerpt
  32. Change excerpt length of first post
  33. Display oEmbed in the_excerpt
  34. Auto Populate Excerpt Field
  35. Remove Text within Header tags in the Excerpt
  36. Line in excerpt and max 5 lines
  37. Show the excerpt in a loop
  38. Custom Excerpts Per Page
  39. Excerpts automatically remove paragraph space
  40. How to apply excerpt length only on front end?
  41. get_the_excerpt() issues – returns the excerpt twice or not at all?
  42. Bug in the_excerpt() function
  43. Excerpt content
  44. Show excerpts of posts on P2 Home page
  45. How to change the length of excerpt() method?
  46. get_the_excerpt without images
  47. Automatic excerpts
  48. How to get only manual excerpts?
  49. How to properly show the Excerpt only if it exists?
  50. The excerpt doesn’t add Read more
  51. How to get excerpt of the recent posts
  52. Problem with viewing single page correctly. (taken half way down the page on click through)
  53. Limit the size of the post excerpt
  54. excerpt box not visible
  55. I can’t modify the ‘Continue reading…’ link of the_excerpt
  56. get video from content
  57. Show Excerpts In Twenty Eleven Theme
  58. How do you edit the html of teaser excerpts
  59. Show image in excerpt post. Image not displaying
  60. the_excerpt() and tag
  61. the_excerpt is not limiting my post page to 55 words?
  62. I want to show post excerpt and cap it at 20 words [duplicate]
  63. Split the_content into two parts
  64. Use get_the_excerpt is returning nothing outside of loop
  65. How to edit a typo in excerpt?
  66. My post excerpt does not work
  67. Creating excerpt with simple “Read more” link
  68. How to remove excerpt white spaces
  69. making the […] clickable
  70. Modify excerpt link
  71. Reblog WordPress to another WordPress?
  72. Append Second Link to Read More
  73. Twenty Eleven: Home Page, View full post of most recent post & Summary of the rest
  74. How to enable excerpts just on the “Posts page”
  75. the_excerpt() is not trimming at
  76. Excerpts not showing
  77. Keep excerpt from stripping URLs and enable autoembed for youtube ONLY?
  78. Excerpt being limited too early
  79. Help needed using wp_trim_words
  80. NextGen Gallery not allowing me to display the_excerpt();?
  81. Excerpt of certain page to display on home page
  82. get_the_excerpt adding unwanted links to output html
  83. Excerpt functions is removing the forward slash on the url
  84. the_excerpt() doesn’t return the Excerpt field content
  85. How to add a new line to an excerpt?
  86. 2 posts same excerpt?
  87. Excerpt displays the current page excerpt not one being pulled
  88. Trimming breaks up markup
  89. Edit the excerpt before it is shown
  90. Is there a html tag filter for the excerpt?
  91. Add rel=lightbox to custom string
  92. Excerpt is only getting shown for first post
  93. WordPress Post Format If Statement?
  94. How to show excerpt field
  95. Post content not showing
  96. Need to show post summary in sidebar
  97. Limited excerpt with readmore
  98. Remove automatic excerpts only for single posts
  99. Setting post excerpt length in php wordpress code, Should will help to save DB size?
  100. Remove the excerpt and “… Read More” from the featured content on the home page with child theme