PHP function Accumulation Summary _php tutorial

Math function:
10 of the more commonly used red.

abs-Absolute Value
acos-Inverse cosine
acosh-Inverse hyperbolic cosine
asin-anyway Chord
asinh-Inverse hyperbolic sine
atan2-two parameters of the inverse tangent
atan-anyway cut
atanh-Inverse hyperbolic tangent
Base_convert-converting numbers between arbitrary binaries
bindec-binary conversion to decimal
Ceil-into one method to take the whole
cos-cosine
cosh-Hyperbolic cosine
decbin-Decimal conversion to Binary
dechex-decimal conversion to hexadecimal
decoct-Decimal conversion to octal
deg2rad-to convert an angle to radians
exp-calculating the exponent of E
The expm1-returns exp (number)-1, even if the value of the count is close to 0 to calculate the exact result
floor-and rounding out the whole process
fmod-returns the remainder of the floating-point number for division
getrandmax-Displays the maximum possible value of the random number
hexdec-16 binary conversion to decimal
hypot-calculating the length of the hypotenuse of the triangle at all angles
is_finite-to determine whether a finite value
is_infinite-to determine if it is an infinite value
is_nan-determine if the value is legal
lcg_value-Combination Linear congruence generator
log10-logarithm with base 10
log1p-returns log (1 + number), even if the value near 0 can calculate the exact result
log-Natural logarithm
max-Find the maximum value
min-Find the Minimum value
mt_getrandmax-display the maximum possible value of a random number
mt_rand-generate a better random number
mt_srand-sowing a better random number generator seed
octdec-octal conversion to decimal
pi-Get pi Value
pow-exponential expression
rad2deg-convert radians to corresponding number of angles
Rand-produces a random integer
Round-rounding of floating-point numbers
sin-sine
sinh-hyperbolic sine
sqrt-Square Root
srand-sowing random number generator seeds
tan-Tangent
tanh-Hyperbolic tangent

String functions:

The more you know, the more you have at least 20. More commonly used red.

addcslashes-using backslashes to escape characters in a string in C language style
addslashes-referencing strings with backslashes
bin2hex-converts binary data to hexadecimal notation
Aliases for Chop-rtrim
chr-returns the specified character
chunk_split-splitting a string into small chunks
Convert_cyr_string-converts a character from one Cyrillic character to another
convert_uudecode-decoding a uuencode encoded string
convert_uuencode-encoding a string with Uuencode
count_chars-returns information about the characters used in the string
crc32-computes a crc32 polynomial of a string
crypt-one-way string hash
echo-output one or more strings
explode-using one string to split another string
Fprintf-writes the formatted string to the stream
get_html_translation_table-returns the conversion table after using Htmlspecialchars and htmlentities
hebrev-Convert Logical Order Hebrew (logical-hebrew) to Visual Order Hebrew (visual-hebrew)
hebrevc-converts logical Order Hebrew (logical-hebrew) to Visual Order Hebrew (visual-hebrew), and converts newline characters
Html_entity_decode-convert all HTML entities to their applicable characters
Htmlentities-convert all applicable characters to HTML entities
Htmlspecialchars_decode-convert Special HTML entities back to characters
Htmlspecialchars-convert special characters to HTML entities
Implode-join array elements with a string
join-alias Implode
Lcfirst-make A string ' s first character lowercase
Levenshtein-calculate Levenshtein distance between, strings
Localeconv-get Numeric formatting information
Ltrim-strip whitespace (or other characters) from the beginning of a string
md5_file-computes the MD5 hash value of the specified file
md5-Calculating the MD5 hash value of a string
Metaphone-calculate the Metaphone key of a string
Money_format-formats a number as a currency string
Nl_langinfo-query Language and locale information
nl2br-inserting HTML wrap tags before all new lines in the string
Number_format-format a number with grouped thousands
Ord-the ASCII value of the returned character
Parse_str-parses the string into variables
print-Output string
printf-Output formatted string
Quoted_printable_decode-convert a quoted-printable string to an 8 bit string
Quoted_printable_encode-convert a 8 bit string to a quoted-printable string
Quotemeta-quote Meta characters
rtrim-Delete whitespace characters (or other characters) at the end of a string
Setlocale-set locale Information
sha1_file-calculating the SHA1 hash value of a file
sha1-calculating the SHA1 hash value of a string
similar_text-calculating the similarity of two strings
Soundex-calculate the Soundex key of a string
Sprintf-return a formatted string
Sscanf-parses input from a string according to a format
str_getcsv-parsing a CSV string as an array
Ignoring case versions of Str_ireplace-str_replace
Str_pad-fills a string with another string for a specified length
str_repeat-repeating a string
str_replace-substring substitution
str_rot13-performing ROT13 conversions on strings
Str_shuffle-randomly disrupts a string
str_split-converting a string to an array
Str_word_count-returns the use of words in a string
strcasecmp-binary Security comparison string (case insensitive)
strchr-alias Strstr
strcmp-Binary Security string comparison
strcoll-locale-based string comparisons
Strcspn-gets the length of the starting substring of the mismatched matte
strip_tags-removing HTML and PHP tags from a string
stripcslashes-dereference A string that is escaped with addcslashes
stripos-find where strings first appear (case insensitive)
stripslashes-dereference A reference string
Ignoring case versions of the STRISTR-STRSTR function
strlen-Get string length
Strnatcasecmp-comparing strings using the natural order algorithm (case insensitive)
Strnatcmp-comparing strings using natural sorting algorithms
strncasecmp-binary security compare several characters at the beginning of a string (case insensitive)
strncmp-binary security compare several characters at the beginning of a string
strpbrk-to find any one character of a set of characters in a string
strpos-find where the string first appears
Strrchr-finds the last occurrence of a specified character in a string
strrev-Inverse string
Strripos-calculates the location of the last occurrence of the specified string in the target string (case insensitive)
Strrpos-calculates the last occurrence of the specified string in the target string
strspn-computes the length of the first string in the specified set of characters, all of which are present in the strings.
strstr-finding the first occurrence of a string
strtok-Tag Split string
strtolower-converting a string to lowercase
strtoupper-converting a string to uppercase
strtr-converting a specified character
substr_compare-binary Security comparison string (specified length from offset position)
substr_count-count occurrences of a string
substr_replace-a substring of a replacement string
substr-returns a substring of a string
trim-remove whitespace characters (or other characters) from the beginning and end of a string
Ucfirst-converts the first letter of a string to uppercase
ucwords-converts the first letter of each word in a string to uppercase
vfprintf-writing a formatted string to a stream
vprintf-Output formatted string
vsprintf-returning a formatted string
wordwrap-break string to a specified number of strings

Array functions

The more you know, the more you have at least 15. More commonly used red.

array_change_key_case-returns an array of string key names that are all lowercase or uppercase
array_chunk-splits an array into multiple
Array_combine-creates an array with the value of an array as its key name, and the value of another array as its value
array_count_values-the number of occurrences of all values in the statistics array
array_diff_assoc-with index Check the difference set of the computed array
array_diff_key-Calculating the difference set of an array using the key name comparison
array_diff_uassoc-uses the user-supplied callback function to do an index check to calculate the difference set of the array
array_diff_ukey-using a callback function to compare the difference set of an array to a key name
array_diff-Calculating the difference set of an array
array_fill_keys-fills an array with the specified key and value
array_fill-fills an array with the given value
array_filter-filter cells in an array with callback functions
Array_flip-exchanging keys and values in an array
array_intersect_assoc-with index Check the intersection of computed arrays
array_intersect_key-calculating the intersection of an array using the key name comparison
array_intersect_uassoc-with index Check the intersection of computed arrays, using callback function to compare indexes
Array_intersect_ukey-computes the intersection of an array using a callback function to compare the key names
Array_intersect-computes the intersection of an array
array_key_exists-checks whether the given key name or index exists in the array
array_keys-returns all the key names in the array
Array_map-the callback function to the cell of the given array
array_merge_recursive-to merge one or more arrays recursively
array_merge-merging one or more arrays
array_multisort-to sort multiple arrays or multidimensional arrays
Array_pad-fills an array to a specified length with a value
array_pop-pops the last cell of the array (out of the stack)
Array_product-computes the product of all values in an array
array_push-pressing one or more cells into the end of the array (into the stack)
array_rand-random extraction of one or more cells from an array
array_reduce-iteratively to simplify the array to a single value with a callback function
Array_replace_recursive-replaces the elements of the first array with the passed array recursion
Array_replace-replaces the elements of the first array with the passed array
array_reverse-returns an array of cells in reverse order
array_search-searches for the given value in the array, and returns the corresponding key name if successful
Array_shift-moves the cell at the beginning of the array to a group
array_slice-remove a paragraph from an array
array_splice-remove part of the array and replace it with other values
Array_sum-computes the and of all values in the array
array_udiff_assoc-with index Check the difference set of the computed array, using the callback function to compare the data
array_udiff_uassoc-with index Check to calculate the difference of the array, compare the data and index with the callback function
array_udiff-comparing data with callback functions to calculate the difference set of an array
array_uintersect_assoc-with index Check the intersection of the computed array, using the callback function to compare the data
array_uintersect_uassoc-with index Check the intersection of computed arrays, using callback functions to compare data and indexes
Array_uintersect-computes the intersection of an array, compares the data with a callback function
array_unique-duplicate values in an array
array_unshift-inserting one or more cells at the beginning of an array
array_values-returns all values in the array
array_walk_recursive-applying user functions recursively to each member in an array
array_walk-applying user functions to each member in an array
array-creating a new array
arsort-an array in reverse order and maintain an index relationship
asort-sorting an array and maintaining an index relationship
compact-create an array, including the variable names and their values
count-count the number of cells in an array or the number of properties in an object
current-returns the current cell in the array
each-returns the current key/value pair in the array and moves the array pointer forward one step
end-the inner pointer of an array to the last cell
extract-importing variables from an array into the current symbol table
in_array-checks if a value exists in the array
key-getting the key name from the associative array
krsort-an array in reverse order by key name
ksort-sorting arrays by key name
List-assigns the values in the array to some variables
natcasesort-sorting of case-insensitive letters using the "natural sort" algorithm for arrays
natsort-using the "natural sort" algorithm to sort arrays
next-moves the inner pointer in the array forward one
Aliases for Pos-current
prev-the internal pointer of the array back to a
range-creating an array containing the specified range of cells
reset-the inner pointer of an array to the first cell
rsort-reverse sequence of an array
shuffle-Array is scrambled
Aliases for Sizeof-count
sort-sorting an array of arrays
uasort-use a user-defined comparison function to sort the values in the array and keep the index associated
uksort-using a user-defined comparison function to sort the key names in an array
Usort-uses a user-defined comparison function to rank the values in the array

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