Functions

Functions WebDev/*nix assorted functions & hacks

snippets .htaccess / mod_rewrite 404 header Ajax response page Basic HTTP Auth Column display sans near-empty columns JavaScript favelets/bookmarklets misc php stuffs php tricks 8 found

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list($a, $b) = array($b, $a); # any number of vars works, obviously

# nested lists fill variables from multidim arrays:
$arr = array(
  array('aaaa', 'bbb'),
  array('cc', 'd')
  );
list(list($a, $b), list($c, $d)) = $arr;
echo "$a $b $c $d"; // aaaa bbb cc d

# list() values to arrays
while (list($arr1[], $arr2[], $arr3[]) = mysql_fetch_row($res)) { .. }
# or get columns from a matrix
foreach($data as $row) list($col_1[], $col_2[], $col_3[]) = $row;

# replace all occurrences of #foo# by $foo in the input file
$func = create_function('$str', 'return $GLOBALS[substr($str[0], 1, -1)];')
$message = preg_replace_callback('/(#[A-Za-z]+#)/', $func, file_get_contents('message_template.txt'));

# abusing the ternary operator to set other variables as a side effect:
$foo = $condition ? 'Yes' . (($bar = 'right') && false) : 'No' . (($bar = 'left') && false);
# boolean False cast to string for concatenation becomes an empty string ''.
# you can also use list() but that is so boring..
list($foo, $bar) = $condition ? array('Yes', 'right') : array('No', 'left');

# use glob() with basename to get a directory listing without the paths
# sorta like scandir() only for php4
$files = array_map('basename', glob('../some_dir/*'));

# gets list of user defined functions:
print_r(array_pop(get_defined_functions()));
# better but longer:
$foo = get_defined_functions();
print_r($foo['user']);

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snippets .htaccess / mod_rewrite 404 header Ajax response page Basic HTTP Auth Column display sans near-empty columns JavaScript favelets/bookmarklets misc php stuffs php tricks 8 found auth	Name: Category: snippets Body: list($a, $b) = array($b, $a); # any number of vars works, obviously # nested lists fill variables from multidim arrays: $arr = array( array('aaaa', 'bbb'), array('cc', 'd') ); list(list($a, $b), list($c, $d)) = $arr; echo "$a $b $c $d"; // aaaa bbb cc d # list() values to arrays while (list($arr1[], $arr2[], $arr3[]) = mysql_fetch_row($res)) { .. } # or get columns from a matrix foreach($data as $row) list($col_1[], $col_2[], $col_3[]) = $row; # replace all occurrences of #foo# by $foo in the input file $func = create_function('$str', 'return $GLOBALS[substr($str[0], 1, -1)];') $message = preg_replace_callback('/(#[A-Za-z]+#)/', $func, file_get_contents('message_template.txt')); # abusing the ternary operator to set other variables as a side effect: $foo = $condition ? 'Yes' . (($bar = 'right') && false) : 'No' . (($bar = 'left') && false); # boolean False cast to string for concatenation becomes an empty string ''. # you can also use list() but that is so boring.. list($foo, $bar) = $condition ? array('Yes', 'right') : array('No', 'left'); # use glob() with basename to get a directory listing without the paths # sorta like scandir() only for php4 $files = array_map('basename', glob('../some_dir/*')); # gets list of user defined functions: print_r(array_pop(get_defined_functions())); # better but longer: $foo = get_defined_functions(); print_r($foo['user']);
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