笨 - 消息：日期時間:: __結構（）：無法解析的時間字符串 - 消息：非合式數值遇到

Question

我試圖格式化的日期和它讓我看到以下消息：

Severity: Notice 

Message: A non well formed numeric value encountered 

我已經嘗試了所有這些，並繼續傳遞消息。

echo date('Y-m-d', '01/01/2017'); 

echo date('Y-m-d', strtotime(str_replace('/','-', '01/01/2017'))); 

$start_date = new DateTime("2017-01-01 20:00:00"); 
$end_date = new DateTime("2018-05-05 22:00:00"); 
$between = $start_date->diff($end_date); 

echo 'between: '.$between->y.' years, <br>' 
        .$between->m.' months, <br>' 
        .$between->d.' days <br>' 
        .$between->days.' days <br>'; 

echo "<pre>"; print_r($between); 

此功能以實現：

public function between_days($start_date, $end_date) 
{ 
    $start_date = strtotime($start_date); 
    $start_date = strtotime(date('d/m/Y')); 
    $end_date = strtotime($end_date); 
    $between = abs($end_date - $start_date); 
    $total = $between/86400; 
    $days = intval($total); 
    return $days; 
} 

Answer 1

Severity: Notice 

Message: A non well formed numeric value encountered 

該通知occure由於

回波日期（ 'YM-d'，'01/01/2017' ）;

你必須刪除上面的行。