$ this_array = array（“this”，“and”，“this”，“and”，“th”）

Question

如何查找数组中元素的长度，以确保每个元素的长度超过2个字符。使用PHP是...

ex。 $ this_array =阵列（ “此”， “和”， “这个”， “和”， “TH”）

Answer 1

foreach($this_array as $val) { 
    $valLength = strlen($val); //gives length 
    if($valLength < 3) { 
     //something here, less than 2 char 
    } 
} 

Answer 2

foreach ($this_array as $key => $value) 
{ 
    if (strlen($value) < 3) 
    { 
     echo "{$value} is too short<br />"; 
    } 
} 

参见foreach

Answer 3

foreach($this_array as $value) { 
    $strlen = strlen($value); 
    if($strlen <= 2) 
    { 
    echo '$value is '.$strlen.' characters long<br />'; 
    // do something with it 
    } 
} 

Answer 4

环接可能有点矫枉过正，除非你需要做更多的事情 - 过滤更有效。

<? 
$this_array = array("a", "this", "and", "this", "and", "th"); 

$this_array = array_filter($this_array, function($val){return strlen($val)>=2;}); 

print_r($this_array); // Array ([1] => this [2] => and [3] => this [4] => and [5] => th) 

注：这只会在PHP 5.3+

Answer 5

$this_array=array ("aa", "bb", "cc", "asd", "aa");  



function lengthCheck($v, $w) 
    { 
    global $lengthOK; 
     $len= strlen($w); 
     if($len<3) 
     { 
     $lengthOK=false; 
     } 
     return $lengthOK; 
    } 


    $lengthOK=true;// set everytime when you call "lengthCheck" 
    $b = array_reduce($this_array, "lengthCheck"); 

    var_dump($b); 

$ B工作将有真/ FLASE。即如果所有元素的长度都是3或更大，则为真，否则为假。