[0812] 5种数组函数

array_chuck()

$stu = [
    'id' => 101,
    'name' => '无忌',
    'age' => 20,
    'course' => 'php',
    'grade' => 80
];
$fn1 = array_chunk($stu,2);
printf("<pre>%s</pre>",print_r($fn1,true));
foreach($fn1 as $singleStudent){
    foreach($singleStudent as $detail){
        echo $detail."<br>";
    }
}
echo "<hr>";

array_combine()

$number = ['1','2','3'];
$student = ['Steve','Carl','Jessica'];
$newClass = array_combine($number,$student);
foreach($newClass as $key=>$singleStudent){
    printf('[ %s ] => %s<br>', $key, $singleStudent);
}
echo "<hr>";

array_map()

$number2 = ['4','5','6'];
function doubleNum($num){
    return $num *2;
}
$afterMap = array_map('doubleNum',$number2);
foreach ($afterMap as $singleNum) {
    echo $singleNum."<br>";
}

echo “<hr>“;

array_merge()

$student2 = ['Leo','Jeff','Dean'];
$studentGroup = array_merge($student, $student2);
foreach($studentGroup as $singleStudent){
    echo $singleStudent."<br>";
}
echo "<hr>";

array_walk()

$fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");
ksort($fruits);
function addFruit($putInFruit, $key){
    echo $key.":".$putInFruit."<br>";
}
array_walk($fruits,'addFruit');
// printf("<pre>%s</pre>",print_r($newFruits,true));