如何使用PHP检查一个字符串是否有逗号分隔值

问题描述：

I need one help.I need to check two type of string value using PHP. I am explaining one example below.

suppose one variable

$sup_id='4' //(datatype-varchar)

$sup_id='4,5,6' //(datatype-varchar)

in above example i have different value in same variable name.Here how can i check that the same variable has one value or different with comma(,) separated.Please help me.

我需要一个帮助。我需要使用PHP检查两种类型的字符串值。我在下面解释一个例子。 p>

假设一个变量 p>

  $ sup_id ='4'//（datatype-varchar）
  
 $ sup_id ='4,5,6'//（datatype-varchar）
  code>  pre> 
 
 在上面的示例中，我在同一变量名中有不同的值。这是怎么回事 我可以检查相同的变量是否有一个值或不同的逗号（， code>）分开。请帮助我。   p> 
  div>

答

Can be easily done by strpos

if (strpos($sup_id, ',') !== false) {
  echo "There's a comma in the string...!!!";
}

答

You could do the following:

$str = '4,5,6';

$exploded = explode(',', $str);

if (sizeof($exploded) > 1) {
  echo 'It is split.';
else {
  echo 'Its not.';
}

What you're doing is, you are splitting the string into an array based on the , delimiter. So if a , exists, the array will have more than 1 value.

如何使用PHP检查一个字符串是否有逗号分隔值

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