《PHP教程：PHP數(shù)組實例詳解》要點：
本文介紹了PHP教程：PHP數(shù)組實例詳解，希望對您有用。如果有疑問，可以聯(lián)系我們。
作為一名C++程序員,在轉做PHP開發(fā)的過程中,對PHP數(shù)組產(chǎn)生了一些混淆,與C++數(shù)組有相似的地方,也有一些不同,下面就全面地分析一下PHP的數(shù)組及其與C++中相應數(shù)據(jù)類型的區(qū)別和聯(lián)系.PHP實例
數(shù)組的分類：PHP實例
1、數(shù)值數(shù)組：也叫索引數(shù)組,即以數(shù)字(從0 開始)作為數(shù)組下標.相當于C++中的vector.PHP實例
2、關聯(lián)數(shù)組：以字符串作為數(shù)組下標.相當于C++中的map.PHP實例
3、多維數(shù)組：數(shù)組中每個元素也是一個數(shù)組.其子數(shù)組中的每個元素也可以是數(shù)組.PHP實例
數(shù)組的聲明：PHP實例
1、數(shù)值數(shù)組PHP實例
a、如下例子中,會自動分配數(shù)字ID鍵.PHP實例
$names = array("Peter","Joe","Lily");
b、如下例子中,我們?nèi)斯し峙鋽?shù)字ID鍵.
PHP實例
$names[0] = "Peter";
$names[1] = "Joe";
$names[2] = "Lily";PHP實例
可以在腳本中使用這些ID鍵：PHP實例
<?php $names[0] = "Peter"; $names[1] = "Joe"; $names[2] = "Lily"; echo $names[0]." and ".$names[1]." are ".$names[2]."'s neighbors"; /* 何問起 hovertree.com */ ?>
2、關聯(lián)數(shù)組：PHP實例
例子1PHP實例
$ages = array("Peter"=>32, "Joe"=>30, "Lily"=>28);PHP實例
例子2PHP實例
本例與例子1相同,只是另一種創(chuàng)建數(shù)組的方法.PHP實例
$ages["Peter"] = "32"; $ages["Joe"] = "30"; $ages["Lily"] = "28";
在腳本中使用關聯(lián)數(shù)組：PHP實例
<?php $ages["Peter"] = "32"; $ages["Joe"] = "30"; $ages["Lily"] = "28"; echo "Peter is ".$ages["Peter"]." years old."; /* 何問起 hovertree.com */ ?>
以上腳本輸出：PHP實例
Peter is 32 years old.PHP實例
3、多維數(shù)組：PHP實例
在本例中,我們創(chuàng)建了一個帶有自動分配數(shù)字ID鍵的多維數(shù)組：PHP實例
$families = array
{
"Griffin"=>array
{
"Peter",
"Lois",
"Megan"
},
"Quagmire"=>array
{
"Glenn"
},
"Brown"=>array
{
"Cleveland",
"Loretta",
"Junior"
}
};
echo "Is " . $families['Griffin'][2] . " a part of the Griffin family?";
以上代碼輸出：PHP實例
Is Megan a part of the Griffin family?PHP實例
1、for循環(huán)遍歷 PHP實例
for循環(huán)只能遍歷索引數(shù)組.PHP實例
<?php
$names = array("Peter","Joe","Lily");
for($id=0;$id<count($names);++$id)
{
echo $names[$id];
}
?>
2、foreach遍歷 PHP實例
即可以遍歷索引數(shù)組,也可以遍歷關聯(lián)數(shù)組PHP實例
遍歷索引數(shù)組PHP實例
foreach(array_expression as $value)
{
循環(huán)體;
}
遍歷關聯(lián)數(shù)組
foreach(array_expression as $key=>$value)
{
循環(huán)體;
}
A、一維數(shù)組遍歷PHP實例
索引數(shù)組PHP實例
<?php
$contact = array("李某","xx公司","abc@xx.com");
foreach($contact as $value)
{
echo $value;
}
?>
<?php
$contact = array("姓名"=>"李某","公司"=>"xx公司","郵箱"=>"abc@xx.com");
foreach($contact as $key=>$value)
{
echo $key.":".$value;
}
?>
B、多維數(shù)組遍歷PHP實例
<?php
$wage = array(
"市場部"=array(
array(1,"李某","市場經(jīng)理",8000),
array(2,"王某","市場專員",5000),
array(3,"劉某","市場專員",7000)
),
"產(chǎn)品部"=array(
array(1,"李某","產(chǎn)品經(jīng)理",9000),
array(2,"王某","產(chǎn)品專員",6000),
array(3,"劉某","產(chǎn)品專員",5000)
),
"賬務部"=array(
array(1,"李某","賬務經(jīng)理",7000),
array(2,"王某","賬務專員",6000),
array(3,"劉某","賬務專員",5000)
)
);
foreach($wage as $section=>$table)
{
echo $section."部門人員如下";
foreach($table as $row)
{
foreach($row as $value)
{
echo $value;
}
}
} /* 何問起 hovertree.com */
?>
以上所述是小編給大家介紹的php數(shù)組的實例詳解,希望對大家有所幫助.PHP實例
轉載請注明本頁網(wǎng)址：
http://www.fzlkiss.com/jiaocheng/6085.html
