PHP < andrewkoper.com
PHP's functions (these are all in the global namespace; these are grouped this way for logical convienence):
ARRAY
- not a complete list
array_column
array_combine
array_count_values
array_diff
array_diff_assoc
array_fill
array_filter
array_find
array_flip
array_intersect
array_key_exists
array_keys
array_merge
array_pad
array_pop
array_push
array_reduce
array_reverse
array_shift
array_slice
array_unique
array_unshift
array_values
arsort
asort
count
implode
in_array
krsort
ksort
shuffle
sort
uksort
usort
DATE
- not a complete listFilesystem
- not a complete listJSON
MATH
- not a complete listSTRING
- not a complete list
addslashes
chop
chr
chunk_split
crypt
echo
explode
hex2bin
html_entity_decode
htmlentities
htmlspecialchars
htmlspecialchars_decode
lcfirst
md5
md5_file
nl2br
parse_str
print
printf
ltrim
rtrim
setlocale
sha1
sha1_file
similar_text
sprintf
str_pad
str_replace
str_shuffle
str_split
str_word_count
strchr
strcoll
strip_tags
strlen
strpos
strstr>
strtolower
strtoupper
strtr
substr
substr_compare
substr_count
trim
ucfirst