@a = ();@a = ( 'xx', 11, 33.5, );@a = 12..33;$a[2] = 'something';$len = scalar(@a);
# or
$len = @a;@a3 = ('xx', @a1, @a2);($x, $y) = @a;$a[@a] = 'new'; # pushpush
pop
shift
unshift
spliceforeach $i (@a) { .. }

$a = array();$a = array( 'xx', 11, 33.5, );$a = range(12,33);$a[2] = 'something';$len = count($a);$a3 = array_merge('xx', $a1, $a2);list($x, $y) = $a;$a[] = 'new'; # pusharray_push
array_pop
array_shift
array_unshift
array_spliceforeach ($a as $i) { .. }

%h = ();%h = ( 'x' => 'y','z' => 'w',);$h{'x'} = 7;while (($key,$value) = each(%h))
{ .. }$a = keys(%h);
$b = values(%h);delete $h{'x'};

$h = array();$h = array( 'x' => 'y','z' => 'w',);$h['x'] = 7;foreach ($h as $key => $value)
{ .. }$a = array_keys($h);
$b = array_values($h);unset( $h['x'] );

%h = ('a'=>13, 'b'=>25);
@x = ('hi', 'there', 'all',);@mix = ( %h, @x,[33..39],{ x=>15, yy=>23, },);$mix[0]->{'b'} # == 25
$mix[0]{'b'} # == 25
$mix[2]->[2] # == 35
$mix[2][2] # == 35

$h = array('a'=>13, 'b'=>25);
$x = array('hi', 'there', 'all',);$mix = array($h, $x,range(33,39),array('x'=>15, 'yy'=>23),);$mix[0]['b'] # == 25$mix[2][2] # == 35

@a = split( '|', $s );@a = split( 's+', $s );$s = join( '|', @a );

$a = preg_split( '/|/', $s,-1, PREG_SPLIT_NO_EMPTY );
$a = preg_split( '/s+/', $s,-1, PREG_SPLIT_NO_EMPTY );$s = join( '|', $a );

$s = lc($s);
$s = uc($s);$s =~ tr/a-z/A-Z/;

$s = strtolower($s);
$s = strtoupper($s);

$s1 eq $s2$s1 lt $s2

strcmp($s1,$s2) == 0
# or
$s1 === $s2strcmp($s1,$s2) < 0

sub foo {my @args = @_;
}sub foo {$x = 5;
}foo2( @a, %h );

function foo() {$args = func_get_args();
}function foo() {global $x;$x = 5;
}function foo2($x, $y) {
}foo2( $a, $h );

$s =~ m/(w+)/;
$substr = $1;@all = ($s =~ m/(w+)/g);$s =~ s/s+/X/;
$s =~ s/s+/X/g;$s =~ s/^s+|s+$//g;

preg_match( "/(w+)/", $s, $match );
$substr = $match[1];preg_match_all( "/(w+)/", $s, $match );
$all = $match[0];$s = preg_replace( "/s+/", 'X', $s, 1 );
$s = preg_replace( "/s+/", 'X', $s );$s = trim($s);

use File::Basename;$b = basename($path);
$d = dirname($path);

$b = basename($path);
$d = dirname($path);

%ENV$ENV{REQUEST_METHOD}$ARGV[$i]$0

$_SERVER$_SERVER[REQUEST_METHOD]$argv[$i+1]$argv[0] # Php/CGI only

#form/hyperlink parameters:
# s : single-valued
# m : multi-valueduse CGI (:standard);$s = param('s');
@m = param('m');@param_names = param();
$num_params = param();

#form/hyperlink parameters:
# s : single-valued
# m[] : multi-valued
# (such as multi-selections
# and checkbox groups)$PARAM= array_merge($_GET, $_POST);$s = $PARAM['s']; # a scalar
$m = $PARAM['m']; # an array$param_names = array_keys($PARAM);
$num_params = count($PARAM);

use CGI (:standard);$ref = "x.cgi";
a({href=>$ref}, "yy")textfield({name=>"yy", size=>5})password({name=>"yy", size=>5})textarea({name=>"yy",cols=>5, rows=>2})submit({value=>"yy"})button( {name=>"xx",value=>"yy",οnclick=>"submit()",})%labels = (0=>'a',1=>'q',2=>'x');
popup_menu( { name=>"xx",values=>[0..2],labels=>%labels,size=>4,})@a = ('xx','yy','zz');
radio_group( { name=>'nn',values=> @a,default=>'_',linebreak=>1,})%labels = ('xx'=>'L1','yy'=>'L2');
@a = keys( %labels );
checkbox_group( { name=>'nn',values=> @a,labels=> %labels,})table(Tr([td(['a','b']),td(['x','y']),]))

# The Perl/CGI functions have the
# additional property of "stability"
# when used in reentrant forms.
# The values of the HTML elements are
# set according to the incoming
# parameter values for those elements.
# The versions below are not stable.$ref = "x.php";
<a href="<?php echo $ref?>">yy</a><input type=text name=yy size=5><input type=password name=yy size=5><textarea name=yy cols=5 rows=2></textarea><input type="submit" value=yy><input type="button"name="xx" value="yy"οnclick="submit()"><select name="xx" size="4">
<?php
$labels = array(0=>'a',1=>'q',2=>'x');
foreach (range(0,2) as $_)echo "<option value='$_'>",$labels[$_];
?></select>$a = array('xx','yy','zz');
foreach ($a as $_)echo "<input type=radioname=nn value='$_'>$_<br>";$labels = array('xx'=>'L1','yy'=>'L2');
foreach (array_keys($labels) as $_)echo "<input type=checkboxname=nn value='$_'>",$labels[$_];<table>
<tr>
<td>a</td><td>b</td></tr>
<tr>
<td>x</td><td>y</td>
</tr>
</table>

use URI::Escape;uri_escape($val)
uri_unescape($val)

 urlencode($val)
urldecode($val)

use DBI;
$dbh = DBI->connect('DBI:mysql:test:localhost',$usr,$pwd
);$dbh->do( $sql_op )$query = $dbh->prepare( $sql_op );
$query->execute();while(@record = $query->fetchrow() )
{ .. }$dbh->quote($val)

$dbh = mysql_connect('localhost', $usr, $pwd
);
mysql_query('USE test')mysql_query( $sql_op );$results = mysql_query( $sql_op );while($record =mysql_fetch_row($results))
{ .. }"'" . addslashes($val) . "'"