(PHP 4, PHP 5, PHP 7)
array_walk — 使锟斤拷锟矫伙拷锟皆讹拷锟藉函锟斤拷锟斤拷锟斤拷锟斤拷锟叫碉拷每锟斤拷元锟斤拷锟斤拷锟截碉拷锟斤拷锟斤拷
锟斤拷锟矫伙拷锟皆讹拷锟藉函锟斤拷 funcname 应锟矫碉拷
array 锟斤拷锟斤拷锟叫碉拷每锟斤拷锟斤拷元锟斤拷
array_walk() 锟斤拷锟斤拷锟杰碉拷 array
锟节诧拷锟斤拷锟斤拷指锟斤拷锟接帮拷臁�array_walk()
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array锟斤拷锟斤拷锟斤拷锟斤拷椤�
callback
锟斤拷锟斤拷锟斤拷锟斤拷锟�
callback 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷array
锟斤拷锟斤拷锟斤拷值锟斤拷为锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷为锟节讹拷锟斤拷锟斤拷
Note:
锟斤拷锟�
callback锟斤拷要直锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫碉拷值锟斤拷锟斤拷锟�callback锟侥碉拷一锟斤拷锟斤拷锟斤拷指锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿何讹拷锟斤拷些锟斤拷元锟侥改憋拷也锟斤拷锟斤拷谋锟皆硷拷锟斤拷楸撅拷锟�
Note:
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷预锟节ｏ拷锟斤拷锟斤拷锟斤拷锟矫猴拷锟斤拷 (锟斤拷锟斤拷 strtolower())锟斤拷 锟斤拷锟阶筹拷锟斤拷锟芥，锟斤拷锟皆诧拷锟绞合碉拷锟斤拷
funcname锟斤拷
只锟斤拷 array 锟斤拷值锟脚匡拷锟皆憋拷锟侥变，锟矫伙拷锟斤拷应锟节回碉拷锟斤拷锟斤拷锟叫改憋拷锟斤拷锟斤拷楸撅拷锟侥结构锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷/删锟斤拷锟斤拷元锟斤拷unset
锟斤拷元锟饺等★拷锟斤拷锟� array_walk()
锟斤拷锟矫碉拷锟斤拷锟斤拷谋锟斤拷耍锟斤拷锟剿猴拷锟斤拷锟侥碉拷锟斤拷为未锟斤拷锟斤拷锟藉，锟揭诧拷锟斤拷预锟节★拷
userdata
锟斤拷锟斤拷峁╋拷丝锟窖★拷锟斤拷锟�
userdata锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟捷革拷
callback funcname锟斤拷
锟缴癸拷时锟斤拷锟斤拷 TRUE锟斤拷 锟斤拷锟斤拷锟斤拷失锟斤拷时锟斤拷锟斤拷 FALSE锟斤拷
锟斤拷锟� callback 锟斤拷锟斤拷锟斤拷要锟侥诧拷锟斤拷锟饺革拷锟斤拷锟侥多，锟斤拷每锟斤拷
array_walk() 锟斤拷锟斤拷 callback
时锟斤拷锟斤拷锟斤拷锟揭伙拷锟� E_WARNING
锟斤拷锟侥达拷锟斤拷
Example #1 array_walk() 锟斤拷锟斤拷
<?php
$fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");
function test_alter(&$item1, $key, $prefix)
{
$item1 = "$prefix: $item1";
}
function test_print($item2, $key)
{
echo "$key. $item2<br />\n";
}
echo "Before ...:\n";
array_walk($fruits, 'test_print');
array_walk($fruits, 'test_alter', 'fruit');
echo "... and after:\n";
array_walk($fruits, 'test_print');
?>
锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�
Before ...: d. lemon a. orange b. banana c. apple ... and after: d. fruit: lemon a. fruit: orange b. fruit: banana c. fruit: apple