function pleac_Extracting_Unique_Elements_from_a_List()
{
// PHP offers the 'array_unique' function to perform this task. It works with both keyed,
// and numerically-indexed arrays; keys / indexes are preserved; use of 'array_values'
// is recommended to reindex numerically-indexed arrays since there will likely be missing
// indexes
// Remove duplicate values
$unique = array_unique($array);
// Remove duplicates, and reindex [for numerically-indexed arrays only]
$unique = array_values(array_unique($array));
// or use:
$unique = array_keys(array_flip($array));
// ----------------------------
// Selected Perl 'seen' examples
foreach ($list as $item) {
if (!isset($seen[$item])) {
$seen[$item] = TRUE;
$unique[] = $item;
}
}
// ------------
foreach ($list as $item) {
$seen[$item] || ++$seen[$item] && ($unique[] = $item);
}
// ------------
function some_func($item)
{
// Do something with '$item'
}
foreach ($list as $item) {
$seen[$item] || ++$seen[$item] && some_func($item);
}
// ----------------------------
foreach (array_slice(preg_split('/\\n/', `who`), 0, -1) as $user_entry) {
$user = preg_split('/\\s/', $user_entry);
$ucnt[$user[0]]++;
}
ksort($ucnt);
echo "users logged in:\n";
foreach ($ucnt as $user => $cnt) {
echo "\t{$user} => {$cnt}\n";
}
}
function pleac_Returning_More_Than_One_Array_or_Hash()
{
// Multiple return values are possible via packing a set of values within a
// numerically-indexed array and using 'list' to extract them
function some_func()
{
return array(array(1, 2, 3), array('a' => 1, 'b' => 2));
}
// ------------
list($arr, $hash) = some_func();
// ----------------------------
function some_func(&$arr, &$hash)
{
return array($arr, $hash);
}
// ------------
$arrin = array(1, 2, 3);
$hashin = array('a' => 1, 'b' => 2);
list($arr, $hash) = some_func($arrin, $hashin);
}
PtcDebug::bufferLog($array, 'testing an array', 'new category');
/* LOGGING AN OBJECT */
PtcDebug::bufferLog((object) $array, 'testing an object');
/* THROWING A NOTICE */
trigger_error('some notice', E_USER_NOTICE);
/* THROWING A WARNING */
trigger_error('some warning', E_USER_WARNING);
/* THROWING AN ERROR */
trigger_error('some error', E_USER_ERROR);
// continue execution with the options "die_on_error" set to false
/* TESTING AN ERROR WITHIN A FUNCTION */
function some_func()
{
fopen();
}
echo some_func();
// will throw an error
/* LOGGING SQL QUERIES AND TIMING EXECUTION */
$sql = 'select from where something';
// some sql query, will be used as reference
PtcDebug::bufferSql('', $sql);
// leaving the first parameter empty, can be added later with the query result
$sql_result = array('key' => 'value', 'key1' => 'value1');
// this should be the sql result of the sql query
PtcDebug::stopTimer($sql);
// time execution, the query is used as reference
PtcDebug::addToBuffer($sql, $sql_result);
// attaching the result to the message based on the reference
/* WATCHING A VARIABLE */
declare (ticks=1) {
$var = 'some test';
