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<?
// common/functions_arraylist.phpinc
// Contains arraylist functions.
// Modified 2018-04-06 JimM listAppend and listPrepend allow 0 as an item.
// array_to_list($array, $separator) .. Returns the array as an trimmed list.
// listAnd($list, $separator) ......... Returns a comma separated list with 'and' inserted.
t_Begin(); // Begin TRACKing included file.
// array_to_list($array, $separator)
// Returns the array as an trimmed list.
// $array = the array used to create the list.
// $separator = the list separator. Default is a comma ','.
function array_to_list($array, $separator=',') {
$list = '';
foreach($array as $item) {
$list .= $item.$separator;
}
$list = substr($list,0,-strlen($separator));
return $list;
}
// listAnd($list, $separator)
// Returns a comma separated list with 'and' inserted.
// $list = the list to modify.
// $separator = the list separator. Default is a comma ','.
// Examples: $list='one' returns 'one'.
// $list='one,two' returns 'one and two'.
// $list='one,two,three' returns 'one, two, and three'.
function listAnd($list, $separator=',', $word='and') {
$listArray = list_to_array($list, $separator);
$listLen = count($listArray);
if ($listLen > 1) {
$list = '';
$separator='';
if ($listLen != 2) { $separatorNext = ', '; } else { $separatorNext = ' '; }
for ($i = 0; $i < count($listArray); $i++) {
if ($i == $listLen-1) { $separator .= $word.' '; }
$list .= $separator.$listArray[$i];
$separator = $separatorNext;
}
}
return $list;
}
// listAppend($list, $item, $separator)
// Returns the list with the $item appended to the end of the list.
// $list = the list.
// $item = the item to append to the list.
// $separator = the list separator. Default is a comma ','.
function listAppend($list, $item, $separator=',') {
if ($list != '') {
if ($item !== '') $list .= $separator.$item;
} else {
if ($item !== '') $list .= $item;
}
return $list;
}
// listDeleteItem($list, $item, $separator=, $all)
// Delete item from list.
// $list = the list.
// $item = the item to delete.
// $separator = the list separator. Default is a comma ','.
// $all = true = delete all occurances of $item.
// false = delete first occurance of $item.
function listDeleteItem($list, $item, $separator=',', $all=false) {
$listArray = explode($separator,$list);
foreach ( $listArray as $key => $value ) {
if ( $value == $item ) {
unset($listArray[$key]);
if ( !$all ) break;
}
}
$list = array_to_list($listArray,$separator);
return $list;
}
// listFind($list, $item, $separator)
// Searches the $list for the $item and returns the first position $item found. The first position is 0. Returns false if not found.
// $list = the list.
// $item = the item to find in the list.
// $separator = the list separator. Default is a comma ','.
function listFind($list, $item, $separator=',') {
$listArray = explode($separator,$list);
$listFind = false;
$listSearch = 0;
foreach ($listArray as $key => $value) {
if ( $listFind === false && $value == $item ) $listFind = $listSearch + 1;
$listSearch++;
}
return $listFind;
}
// listFirst($list, $separator)
// Removes the first item in the list and returns it. Returns false if there are no items in the list.
// $list = the list.
// $separator = the list separator. Default is a comma ','.
function listFirst(&$list, $separator=',') {
if ( $list != '' ) {
$listArray = explode($separator,$list);
$listFirst = $listArray[0];
$list = '';
if ( count($listArray) > 1 ) {
$list = $listArray[1];
for ($i=2; $i<count($listArray); $i++) {
$list .= $separator.$listArray[$i];
}
}
} else {
$listFirst = false;
}
return $listFirst;
}
// listGetAt($list, $index, $separator)
// Returns the value of the list item at the $index position. If there is no entry at $index returns false.
// $list = the list to use.
// $index = the index of the list item to return. The $index begins with 0.
// $separator = the list separator. Default is a comma ','.
function listGetAt($list, $index, $separator=',') {
$listArray = explode($separator,$list);
if ( is_numeric($index) && $index >= 0 && $index < count($listArray) ) {
$listGet = $listArray[$index];
} else {
$listGet = false;
}
return $listGet;
}
// listLast($list, $separator)
// Removes the last item in the list and returns it. Returns false if there are no items in the list.
// $list = the list.
// $separator = the list separator. Default is a comma ','.
function listLast(&$list, $separator=',') {
if ( $list != '' ) {
$listArray = explode($separator,$list);
$listLast = $listArray[count($listArray)-1];
$list = '';
if ( count($listArray) > 1 ) {
$list = $listArray[0];
for ($i=1; $i<count($listArray)-1; $i++) {
$list .= $separator.$listArray[$i];
}
}
} else {
$listLast = false;
}
return $listLast;
}
// listLen($list, $separator)
// Returns the length of the list.
// $list = the list to count.
// $separator = the list separator. Default is a comma ','.
function listLen($list, $separator=',') {
if ( $list != '' ) {
$listArray = explode($separator,$list);
$listLen = count($listArray);
} else {
$listLen = false;
}
t_Func($listLen);
return $listLen;
}
// listNonEmpty($list, $whitespace, $separator=',')
// Returns the list without any empty elements.
// $list = the list to parse.
// $whitespace = True to keep whitespace elements, false to remove them. Default is true.
// $separator = the list separator. Default is a comma ','.
function listNonEmpty($list, $whitespace=true, $separator=',') {
$listArray = explode($separator,$list);
$listNonEmpty = '';
foreach ($listArray as $value) {
if ( !$whitespace ) $value = trim($value);
if ($value != '') { $listNonEmpty .= $separator.$value; }
}
$listNonEmpty = substr($listNonEmpty,strlen($separator));
return $listNonEmpty;
}
// listOr($list, $separator)
// Returns a comma separated list with 'or' inserted.
// $list = the list to modify.
// $separator = the list separator. Default is a comma ','.
// Examples: $list='one' returns 'one'.
// $list='one,two' returns 'one or two'.
// $list='one,two,three' returns 'one, two, or three'.
function listOr($list, $separator=',') {
$listOr = listAnd($list, $separator,'or');
return $listOr;
}
// listPrepend($list, $item, $separator)
// Returns the list with the $item prepended to the beginning of the list.
// $list = the list.
// $item = the item to prepend to the list.
// $separator = the list separator. Default is a comma ','.
function listPrepend($list, $item, $separator=',') {
if ($list != '') {
if ($item !== '') $list = $item.$separator.$list;
} else {
if ($item !== '') $list .= $item;
}
return $list;
}
// listSort($list)
// Return a sorted list.
function listSort($list) {
$listArray = list_to_array($list);
sort($listArray);
$listSort = array_to_list($listArray);
return $listSort;
}
// list_to_array($list, $separator)
// Returns the list as a trimmed array.
// $list = the list to split.
// $separator = the list separator. Default is a comma ','.
function list_to_array($list, $separator=',') {
$list_to_array = explode($separator,$list);
for ($i = 0; $i < count($list_to_array); $i++) {
$list_to_array[$i] = trim($list_to_array[$i]);
}
return $list_to_array;
}
// listUnique($list, $separator)
// Returns the list without duplicates.
// $list = the list to parse.
// $separator = the list separator. Default is a comma ','.
function listUnique($list, $separator=',') {
$listUnique = '';
$list_to_array = explode($separator,$list);
$listAddedArray = array();
for ($i = 0; $i < count($list_to_array); $i++) {
if ( !in_array($list_to_array[$i],$listAddedArray) ) {
$listUnique = listAppend($listUnique, $list_to_array[$i]);
$listAddedArray[] = $list_to_array[$i];
}
}
return $listUnique;
}
t_End(false, __FILE__, __LINE__); // End TRACKing included file.
?>