PHP introductory learning knowledge point 5: Several basic operations on PHP arrays_PHP tutorial

Copy code The code is as follows:

/*
* Simple array definition and access
*/
echo "Simple array definition and access
";
echo "######################## #################################
";
$address=array(5 );
$address[0]="Fuzhou";
$address[1]="Xiamen";
$address[2]="Zhangzhou";
$address[3]= "Quanzhou";
$address[4]="Ningde";
$address[5]="Nanping";
$address[6]="Longyan";
echo "I am now Live at $address[1]
";
echo "############################### #########################


";
/*
* Array traversal
*/
echo "Array traversal through for loop
";
echo "################### #####################################
";
for ($index=0;$indexprint("The $address[$index] of the ".$index."th area in the array is
") ;
}
echo "###################################### ##################


";
/*
* Array initialization
*/
echo "Initialize the array, get the number of the current month through the date function, and output the content of the relevant array subscript
";
echo "############## ##########################################
" ;
$arrMonth=array("January","February","March","April","May","June","July","August","September","October"," November","December");
date_default_timezone_set("utc"); //Set the default time zone
$month=date("m");
echo "The array structure is";
print_r ($arrMonth);
echo "The current month is ".$month.", its English is ".$arrMonth[$month-1]."
";
echo "## ################################################ ########


";
/*
*Array initialization, and define keys, and then access the array through key values
*/
echo "Initialize the array, define the keys, and then access the array through the keys
";
echo "###################### ##################################
";
$arrMonth=array ("Jan"=>"January","Feb"=>"February","Mar"=>"March","Apr"=>"April","May"=>"May" ,"Jun"=>"June","Jul"=>"July"
,"Aug"=>"August","Sept"=>"Septmber","Oct"=> "October","Nov"=>"November","Dec"=>"December"
);
echo "Access the array through the English abbreviation Aug".$arrMonth["Aug"]."
";
echo "##################################### ####################


";
echo "The following traverses the array through Foreach
" ;
echo "########################################### ###############
";
foreach ($arrMonth as $key=>$value){
echo " =>The key is $ key, the value is $value
";
}
echo "############################# ############################


";

/*
* Define multi-dimensional array
*/
echo "Define two-dimensional array
";
$arrArea=array("East China"=>array("Fujian", "Zhejiang"),"North China"=>array("Beijing","Tianjin"));
echo "East China=>".$arrArea["East China"][0]
?>

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