如何查找數組的大小

Question

1）如何查找數組的大小
2）如何執行數組大小大於零的代碼塊？

if($result > 0){ 
     /////////here is some code body which i want to execture///////// 
}eles{ 
    ///////some other code//////// 
} 

Answer 1

你可以使用count（）或的sizeof（）PHP函數一樣

if(sizeof($result) > 0){ 
    echo "array size is greater then zero"; 
}else{ 
    echo "array size is zero"; 
} 

，或者你可以使用

if(count($result) > 0){ 
echo "array size is greater then zero"; 
}else{ 
    echo "array size is zero"; 
} 

我希望它會幫助你

Answer 2

count - 計數在一個陣列，或東西的所有元素中的對象

int count (mixed $array_or_countable [, int $mode = COUNT_NORMAL ]) 

計數陣列中的所有元件，或者在對象的東西。

例：

<?php 
$a[0] = 1; 
$a[1] = 3; 
$a[2] = 5; 
$result = count($a); 
// $result == 3 

在你的情況下，它是這樣的：

if (count($array) > 0) 
{ 
    // execute some block of code here 
} 

Answer 3

你可以避開長檢索和查詢使用簡單的foreach

foreach($result as $key=>$value) { 
    echo $value ; 
} 

Answer 4

@Sajid馬哈茂德在PHP中，我們有計數（）來計算一個數組的長度， 當計數（）返回0，則意味着該數組爲空

允許以一個例子的理解

<?php 
    $arr1 = array(1); // with one value which will give 1 count 
    $arr2 = array(); // with no value which will give 0 count 

    //now i want that the arrray which has greater than 0 count should print other wise not so 

    if(count($arr1)){ 
     print_r($arr1); 
    } 
    else{ 
     echo "sorry array1 has 0 count"; 
    } 

    if(count($arr2)){ 
     print_r($arr2); 
    } 
    else{ 
     echo "sorry array2 has 0 count"; 
    }