Question

<?PHP
$signup_errors = array();
$signup_errors['captcha'] = 'test 1';
$signup_errors['something'] = 'test 2';
$signup_errors['another'] = 'test 3';
$signup_errors['getthepoint'] = 'test 4';

//this would work
if (isset($signup_errors) && in_array('test 4', $signup_errors)){
    echo 'it works';
} 

//However I need something like this to work
if (isset($signup_errors) && in_array('captcha', $signup_errors)){
    echo 'it works';
} 
?>

这里的最终目标是有一个html表单，我可以在其中更改css div类名称是否存在一个错误数组项，所以如果它带回来

$signup_errors['captcha'] = 'Please enter the correct security code';

然后在表格上我会有类似的东西

<input type="text" class="textarealong <?PHP if (isset($signup_errors) && in_array('captcha', $signup_errors)){echo 'error-class';}?> " value=''>

Answer 1

使用array_key_exists

代替in_array

<input type="text" class="textarealong <?PHP if (isset($signup_errors) && array_key_exists('captcha', $signup_errors)){echo 'error-class';}?> " value=''>

Answer 2

好吧我觉得我明白了，php键存在似乎可以做到这一点

<?php
$search_array = array('first' => 1, 'second' => 4);
if (array_key_exists('first', $search_array)) {
    echo "The 'first' element is in the array";
}
?>

Answer 3

在你的情况下，我会使用

isset($search_array['first']);

而不是

array_key_exists('first', $search_array);

对我来说，它可能更快，更具可读性。

我怎么能用PHP数组做到这一点？

3 个答案: