Ausführliche Erklärung zum Löschen von Elementen in Arrays in PHP (unset, array_splice). Zusammenfassung der Hinzufügungen und Löschungen von Array-Elementen

$arr0=array('a','b','c','d','f');  
$arr1=array(  
        'name'=>'lidequan',  
        'tel'=>'131****1234',  
        'height'=>'175',  
        'weight'=>'65'  
    );  
$arr2=array(  
        1=>'lidequan',  
        3=>'131****1234',  
        4=>'175',  
        6=>'65'  
    );  
$arr3=array(  
        'a'=>'lidequan',  
        3=>'131****1234',  
        4=>'175',  
        10=>'1705',  
        'b'=>'65'  
    );  
//1. array_splice($arr0,2,1);   
//2. unset($arr0[2]);  
  
//3. array_splice($arr1,2,1);  
//4. unset($arr1['height']);  
  
//5. array_splice($arr2,2,1);  
//6. unset($arr1[4]);  
  
//7.array_splice($arr3,2,1);

array (size=4)  
  0 => string 'a' (length=1)  
  1 => string 'b' (length=1)  
  2 => string 'd' (length=1)  
  3 => string 'f' (length=1)

array (size=4)  
  0 => string 'a' (length=1)  
  1 => string 'b' (length=1)  
  3 => string 'd' (length=1)  
  4 => string 'f' (length=1)

array (size=3)  
  'name' => string 'lidequan' (length=8)  
  'tel' => string '131****1234' (length=11)  
  'weight' => string '65' (length=2)

array (size=3)  
  0 => string 'lidequan' (length=8)  
  1 => string '131****1234' (length=11)  
  2 => string '65' (length=2)

array (size=3)  
  1 => string 'lidequan' (length=8)  
  3 => string '131****1234' (length=11)  
  6 => string '65' (length=2)  

7的执行结果如下：

array (size=4)  
  'a' => string 'lidequan' (length=8)  
  0 => string '131****1234' (length=11)  
  1 => string '1705' (length=4)  
  'b' => string '65' (length=2)

array_unshift($a,"blue");

array_push($a,"blue");

$a[]='blue';

array_unshift($a);

array_pop($a);

array_splice($a,2,1);

unset($a[2]);