PHP array (array) Output three forms

 

Code

$ BBBB = Array ( " 11 " => " Aaa " , " 22 " => " Bbb " );

//Only output value and not output key
Foreach($ BBBB As $ Color){
Echo $ Color;
}

// Both value and key can be output.
Foreach ( $ BBBB   As   $ Key => $ Value )
{
Echo   $ Key . " => " . $ Value ;
}

// Both value and key can be output.
While ( $ Color = Each ( $ BBBB )){
Echo   $ Color [ ' Key ' ];
} Or While(List ($ key, $ value)=Each($ BBBB)){
Echo "$ Key: $ value <br>";
}

 

 

Directly access the array elements:

 

Code

<? PHP
$ Arr = Array ( ' W ' => ' Wen ' , ' J ' => ' Jian ' , ' B ' => ' Bao ' );

Echo ( $ Arr [ ' W ' ]) , ' <Br/> ' ;//Function
Echo ( $ Arr [W]) , ' <Br/> ' ;//Function
Echo ( $ Arr [ 0 ]) , ' <Br/> ' ; // No Why ???
Echo ( $ Arr [ ' J ' ]) , ' <Br/> ' ;//Function
Echo ( $ Arr [J]) , ' <Br/> ' ;//Function
Echo ( $ Arr [ 1 ]) , ' <Br/> ' ; // No Why ???
Echo ( $ Arr [ ' B ' ]) , ' <Br/> ' ;//Function
Echo ( $ Arr [B]) , ' <Br/> ' ;//Function
Echo ( $ Arr [ 2 ]) , ' <Br/> ' ; // No Why ???

?>

 

Output:

Wen
Wen

Jian
Jian

Bao
Bao
 

 

Question:

AccessJoin ArrayElement,
1. The "key" in [] can also be accessed without quotation marks ???
2. array index access does not work ???

 

<? PHP
$ Arr1 = Array ( ' Wen ' , ' Jian ' , ' Bao ' );

echo $ arr1 [ 0 ] , '
' , $ arr1 [ 1 ] , '
' , $ arr1 [ 2 ];
?>

 

Output:

 

Wen
Jian
Bao