Question

I m trying to create a function that searches through the user input to see if they have entered the name of a day. For some reason, this function only seems to return true if any two day names have been entered. This could be something simple, but I can t seem to figure it out.

我的守则是:

<?php
if(isset($_POST[ query ]))
{
    $query=$_POST[ query ];
    $dow=array( monday , tuesday , wednesday , thursday ,
         friday , saturday , sunday );

    foreach($dow as $day)
    {
        if(stripos($query, $day)==FALSE)
        {
        }
        else
        {
            echo"hurray";
        }
    }
}
?>

<html>
    <form action="datefunctiontester.php" method="post">
        <p>Search</p><input type="text" name="query">
        <input type="submit">
    </form>
</html>

Answer 1

你们应当使用

if (stripos($query, $day) === FALSE){

and not

if (stripos($query, $day)==FALSE){

这是因为,如果在问询开始时就找到了名字,那将返回0,因为第一种身份是假的。检查是否使用<代码>=,检查类型而不是数值。

也可以使用功能,而不是休息。

if (isset($_POST[ query ]))
{
    $query = $_POST[ query ];
    $dow = array( monday , tuesday , wednesday , thursday , friday , saturday , sunday );
    if (in_array($query, $dow) 
    {
        echo"hurray";
    }
}

Answer 2

==不=见。手工操作

Answer 3

为此:

if (isset($_POST[ query ]) {
   $dow = array( monday , tuesday , wednesday , thursday , friday , saturday , sunday );    
   if (in_array(trim(strtolower($_POST[ query ])), $dow) echo"hurray";
}

Answer 4

在这种情况下无需使用<代码>stripos()。

// Force lower case for comparisons
$query = strtolower( $_POST[ query ] );
$dow = array( monday , tuesday , wednesday , thursday ,
     friday , saturday , sunday );

$found = in_array($query, $dow, true);

if($found)
{
    // do something
}

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