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array

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Ói*¨: array array(...);

*µ»ØÖµ:Êý×e

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$fruits = array(
"fruits" => array("a"=>"orange","b"=>"banana","c"=>"apple"),
"numbers" => array(1, 2, 3, 4, 5, 6),
"holes" => array("first", 5 => "second", "third")
);

²Î¿¼ list()

array_walk
ÈÃʹÓÃÕß×Ô¶(C)º¯ÊýÄÜ´¦ÀiÊý×eÖеÄÿһ¸oÔªËØ¡£

Ói*¨: int array_walk(array arr, string func);

*µ»ØÖµ: ÕuÊý

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ÄÚÈÝ˵Ã÷ ´Ëº¯Êýʹÿ¸oÊý×eÔªËØ arr ÒÀÐoÓeº¯ÊýÃu³Æ func Ïa¶ÔÓ¦¡£ÔªËØ´«Ë͵½º¯Êý func µÄµÚÒ»¸o²ÎÊý£¬Èo²ÎÊý³¬¹ýÒ»¸o£¬Ôoÿ´Î¶¼»aÓо¯¸aeÐÅÏ¢¡£Òª´¦Ài¾¯¸aeÐÅÏ¢£¬¿ÉÔÚ±¾º¯ÊýÇ°Ãae¼ÓÉÏ '@' ×Ö*u (±a³É @array_walk)£»»oÊÇʹÓà error_reporting º¯Êý¡£

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ʹÓÃ*¶Àý

<?
$fruits = array("d"=>"lemon","a"=>"orange","b"=>"banana","c"=>"apple");
function test_alter( $item1 ) {
$item1 = 'bogus';
}function test_print( $item2 ) {
echo "$item2
n";
}array_walk( $fruits, 'test_print' );
array_walk( $fruits, 'test_alter' );
array_walk( $fruits, 'test_print' );
?>
²Î¿¼ each() list()

arsort
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Ói¨: void arsort(array array);
µ»ØÖµ: ÎÞ
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ʹÓöÀý
µ×ϵĶÀý*µ»ØµÄ½a¹uΪ
fruits[a] = orange
fruits[d] = lemon
fruits[b] = banana
fruits[c] = apple¡£
ÎÒÃÇ¿ÉÒÔ¿´µ½Ë®¹uÃu (Êý×eÖµ) ÒÑ°´Ó¢ÎÄ×ÖĸµÄ˳ÐoÓÉ z Íu a ÖØÐÂÅÅÐo£¬¶øË÷ÒýÒa¸u×ÅÖµ±a¶¯¡£
<?
$fruits = array("d"=>"lemon","a"=>"orange","b"=>"banana","c"=>"apple");
arsort($fruits);
for(reset($fruits); $key = key($fruits); next($fruits)) {
echo "fruits[$key] = ".$fruits[$key]."n";
}
?>

²Î¿¼ asort() rsort() ksort() sort()

asort
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Ói¨: void asort(array array);
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ʹÓöÀý
µ×ϵĶÀý*µ»ØµÄ½a¹uΪ
fruits[c] = apple
fruits[b] = banana
fruits[d] = lemon
fruits[a] = orange
ÎÒÃÇ¿ÉÒÔ¿´µ½Ë®¹uÃu (Êý×eÖµ) ÒÑ°´Ó¢
ÎÄ×ÖĸµÄ˳ÐoÓÉ a Íu z ÅÅÐo£¬¶øË÷ÒýÒa¸u×ÅÖµ±a¶¯¡£
<?
$fruits = array("d"=>"lemon","a"=>"orange","b"=>"banana","c"=>"apple");
asort($fruits);
for(reset($fruits); $key = key($fruits); next($fruits)) {
echo "fruits[$key] = ".$fruits[$key]."n";
}
?>

²Î¿¼ arsort() rsort() ksort() sort()

count
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Ói¨: int count(mixed var);
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ÄÚÈÝ˵Ã÷ Õa¸oº¯ÊýÓÃÀ´¼ÆËaÊý×eµÄÔªËظoÊý (Òa¿É½«±aÁ¿´uÈe£¬Ö»²»¹ýµ»ØµÄÕuÊý½«ÊÇ 1)¡£±aÁ¿»¹Ã»ÓÐÅaÖÃʱ£¬µ»ØֵΪ 0¡£±aÁ¿Èo²»ÊÇÊý×e£¬*µ»ØֵΪ 1¡£

²Î¿¼ sizeof() isset() is_array()

current
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Ói¨: mixed current(array array);
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²Î¿¼ end() next() prev() reset()

each
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Ói¨: array each(array array);
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ʹÓöÀý
¶ÀýÒ»:
<?
$foo = array( "bob", "fred", "jussi", "jouni" );
$bar = each( $foo );
?>
ÉÏÃaeµÄÀý×Ó£¬*µ»ØÊý×e $bar µÄ Ë÷Òý/Öµ Ϊ
0 => 0
1 => 'bob'
key => 0
value => 'bob'

¶Àý¶þ:
<?
$foo = array( "Robert" => "Bob", "Seppo" => "Sepi" );
$bar = each( $foo );
?>
Õa¸oµÄÀý×Ó£¬µ»ØÊý×e $bar µÄ Ë÷Òý/Öµ Ϊ
0 => 'Robert'
1 => 'Bob'
key => 'Robert'
value => 'Bob'

*¶ÀýÈý:
each() º¯Êý×iµaÐ͵ÄÀý×ÓÊÇÄÃÀ´Óe list() º¯ÊýºÏÓã¬ÈçÏÂÀýµÄ $HTTP_POST_VARS ±aÁ¿¡£
<?
echo "POST ËuËͳoµÄֵΪ:
";
while ( list( $key, $val ) = each( $HTTP_POST_VARS ) ) {
echo "$key => $val
";
}
?>

²Î¿¼ current() key() list() next() prev() reset()

end
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Ói¨: end(array array);
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key
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Ói¨: mixed key(array array);
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ÄÚÈÝ˵Ã÷
±¾º¯Êý´ÓÄ¿Ç°Êý×eµÄÖ¸Õe£¬*µ»ØÆaË÷Òý

²Î¿¼ current() next()

ksort
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Ói¨: void ksort(array array);
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