[英]PHP - Get and compare row value from a different column for the same row
I'm attempting to edit a custom function and struggling to get the row value for a particular custom column ('rank_td') to compare against its other columns (rank_lw and rank_lm), all inside a HTML table.我正在尝试编辑自定义函数并努力获取特定自定义列 ('rank_td') 的行值,以便与其他列(rank_lw 和 rank_lm)进行比较,所有这些都在 HTML 表中。
Tried a fair few variations and can't get it going.尝试了相当多的变化,但无法继续。
Any ideas?有任何想法吗?
function custom_value($cellValue, $dataColumnHeader, $rank_td_value) {
if($dataColumnHeader == "rank_lw" || $dataColumnHeader == 'rank_lm'){
$row['rank_td']->$cellValue = $rank_td_value;
if($rank_td_value == $cellValue){
$styleColor = 'color:blue;';
}else if($rank_td_value < $cellValue){
$styleColor = 'color:green;';
}else{
$styleColor = 'color:red;';
}
return $class_name.'<span style="'.$styleColor.'">'.$cellValue.'</span>';
}
return $cellValue; }
You are not calling the global variable $row
which exists outside the scope of this function - hence my comment that it doesn't look like it belongs here.您没有调用存在于该函数范围之外的全局变量
$row
- 因此我的评论是它看起来不属于这里。 If you want to be able to access a variable from outside a function you need to either pass that variable in, or declare it using the global keyword.如果您希望能够从函数外部访问变量,您需要传入该变量,或者使用 global 关键字声明它。 Here is a very basic example of this:
这是一个非常基本的例子:
$row['some_value'] = "value1";
function scopeTest($var1) {
$row['some_value'] = $var1;//local variable $row created
}
function scopeTestTwo($var1) {
global $row;//variable outside the function
$row['some_value'] = $var1;
}
scopeTest("jam");
print_r($row);//Array ( [some_value] => value1 )
scopeTestTwo("jam");
print_r($row);//Array ( [some_value] => jam )
in your code you also have this在你的代码中你也有这个
return $class_name.'<span....
but $classname
is not defined so either it is redundant and you should remove it (because this will cause a php notice and anyway redundant code is, well, redundant) or it should be defined somewhere which means something has been missed out但是
$classname
没有定义所以要么它是多余的,你应该删除它(因为这会导致一个 php 通知,无论如何冗余代码是,好吧,多余的)或者它应该被定义在某处,这意味着某些东西被遗漏了
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