// 40 characters string combine by 5 different fields
$field1 = apple;
$field2 = orange;
$field3 = pineapple;
$field4 = banana;
$field5 = strawberry;
// fields will be separated with a comma
$string = implode(", ", array_filter(array($field1, $field2, $field3, $field4, $field5)));
// string will be cut off at about 15th characters then make a break line
$stringList = explode("\n", wordwrap($string , 15));
// 1st rowField takes the 1st line of string
$rowField1 = array_shift($nutritionalList);
$string = implode(" ",$stringList);
$stringList = explode("\n", wordwrap($string , 25));
$rowField2 = "From 1st Row continued" . "\n" . implode("\n", $stringList) . "\n \n";}
,此输出将显示:如果PHP语句不工作?
$rowField1 = "apple, orange"
$rowField2 = "From 1st Row continued \n pineapple, banana, strawberry"
不过,我的问题是,如果$field3
,$field4
,并且$field5
是NULL,我不希望显示$rowField2
包括文字“从第一行继续”
我试过的if/else和ISSET过程:
if (isset($stringList)) {
$rowField2 = "From 1st Row continued\n" . implode("\n", $stringList) . "\n\n";
}
else {
$rowField2 = NULL;
}
但$rowField2
仍显示“从第一行继续”。我希望它不显示,如果最后3个字段是NULL。
是不是故意的,你写例如'$ field1 = apple;'而不是'$ field1 =“apple”;'?我没有看到那些定义的常量。 –
@Tomalak Geret'kal:抱歉,错字。我尽可能快地重新输入代码,以快速解决问题。反正,shashank的解决方案为我工作。所以我很高兴:)感谢您的查看 –
您可以点击上面的“编辑”来修复您的问题中的代码。 –