关于php变量的值

<?php echo $arcRow['click']; ?>

把调用的值等于$arcRow['click']-50代码应当怎么写

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要减50？
可以用个变量撒
也可以echo "$arcRow['click']-50"

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如果变量$arcRow['click']是数值，直接$arcRow['click']=$arcRow['click']-50就行了，否则先转换为数值

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<?php
$tmp=$arcRow['click']-50;
echo $tmp;
?>

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<?php echo (intval($arcRow['click'])-50); ?>
试试？如果不行就分开写吧，像3楼那样

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<?php
$temp=intval($arcRow['click']-50);
echo $temp;
?>

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<?php echo $arcRow['click']-50; ?>

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<?php echo (intval($arcRow['click'])-50); ?>  就这个吧,省着你麻烦.

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<?php echo (intval($arcRow['click'])-50);?>