Some quick corrections for the Function Index:
pg. 162
preg_match_all: 157-158
pg. 161
array_combine: 73
array_key_exists: 79-80
Tag: array_key_exists
array_key_exists() Function Index Correction
Thanks to John for submitting this correction!
In the Function Index (pg. 161), array_key_exists() is listed as page 82. However, it is actually on page 79.
Feel free to submit a correction yourself if you find any!