title: PHP - Check if a text is containing a word
body: <p>I want to check if my text contains one of words, probably from an array like:</p>
  
  <p>$array = array('BIG','SMALL', 'NORMAL');</p>
  
  <p>Example of what can contains my text variable:
  $text = "BEAUTIFUL BIG UMBRELLA...";
  $text = "SMALL GREEN TEE-SHIRT";</p>
  
  <p>I want to set a variable size; 
  --> if my text contains the word BIG, I want to set the variable size='BIG'....</p>
  
  <p>Thanks a lot.</p>