Basic PHP Functions
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Created by:
flash4syth on July 9, 2011
Subjects:
Description:
Basic PHP Functions
Classes:
DAD HELL, PHP Concepts and Terms
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38 terms
Terms | Definitions |
|---|---|
 number_format() | returns a number string in comma format |
| trim() | returns a string trimmed of leading and trailing whitespace |
| strlen() | returns length of string |
| if() | returns true or false |
| strcasecmp() | returns 0 if two strings are equal, ignoring case |
| printf() | returns formatted string, % is replaced by an item to print |
| strtoupper() | makes letters uppercase in a string |
| strtolower() | makes letters lowercase in a string |
| ucwords() | capitalizes the first letter of each word |
| substr() | takes 3 arguments: string, starting position, number of characters to return |
| str_replace() | takes 2 arguments: string, replacement string |
| abs() | returns absolute value of an argument |
| strcmp() | compares 2 strings, returns +#, -#, or 0 based on comparison |
| while() | repeating if() |
| for() | a loop that takes 3 expressions: initialization, test, and iteration |
| array() | used for adding multiple elements to an array as comma delimited 'key => value' lists |
| count() | accepts an array, returns number of elements |
| foreach($array as $key => $value) | a loop with 3 args: array, $key, $value |
| array_key_exists() | accepts 2 args: key, array -> true or false |
| in_array() | accepts 2 args: value, array -> true or false. Value is case sensitive for strings. |
| unset() | removes an array element |
| implode() | 2 args: delimiter, array. prints out elements of an array separated by the delimiter |
| explode() | 2 args: delimiter, array. creates an array using the delimiter to distinguish elements |
| sort() | sorts an array by element value and reassigns the element keys in order of sorting: zero to last element |
| asort() | used for associative arrays, same as sort(), but does not reassign keys |
| ksort() | sorts an array by keys |
| rsort() | reverse sorting of sort() |
| arsort() | inverse of asort() |
| krsort() | inverse of ksort() |
| array_search() | 2 args: value, array -> key |
| dechex() | accepts decimal number -> hexadecimal form |
| intval() | number, string, or mixed -> integer with letters discarded |
| floatval() | number, string, or mixed -> floating point number with letters discarded |
| preg_match() | 2 args: regex, string -> 0 pattern didn't match or 1 pattern matched once |
| strip_tags() | removes html tags from a string |
| htmlentities() | encodes special html characters of a string |
| nl2br() | accepts string -> string with each \n replaced by <br> |
| strval() | converts an integer or float into a string |
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