Check if a word / substring exists in a given string input.

Using strpos() to find the position of the first occurrence of a substring in a string.

代码实现

function isContains($string, $needle)
{
  return strpos($string, $needle) === false ? false : true;
}

使用样例

isContains('This is an example string', 'example'); // true
isContains('This is an example string', 'hello'); // false