CODEWITHSUNDEEP
php
Martin
Martin

Reputation: 21

Check for exact sentence within a string PHP

I am trying to check if a string contains an exact sentence.

Example:

 $sentence = "welcome to";
 $string = "hello and welcome to my website.";
 if(strpos($string, $sentence) !== false) {
    //found PART of "welcome to" in the $string
    //Only want it to come back true is it contains "welcome to".
 }

I now want to check if it contains exactelly "welcome to". Not "come to" or "welcome"... The exact value of $sentence. Also it needs to be dynamic. So checking from a variable against a variable that could contain any sentence.

Thanks. Martin.

Upvotes: 0

Views: 2251

Answers (2)

Funk Forty Niner
Funk Forty Niner

Reputation: 74217

Using preg_match() will be better to get an exact match and using the \b word boundary.

$string = "hello and welcome to my website.";
if ( preg_match("~\bwelcome to\b~",$string) ){

  echo "Match found.";
  }
else{
  echo "No match found.";
 }

While doing:

~\bcome to\b~

won't be a match.

Edit:

// will match
$sentence = "welcome to"; 

// will not match
// $sentence = "come to"; 

$string = "hello and welcome to my website.";

if(preg_match("~\b".$sentence."\b~", $string)){
  echo "An exact match was found.";
  }
else{
  echo "No exact match was found.";
  }

To add case-insensitivity use the i switch:

if (preg_match("#\b".$sentence."\b#i",$string))

Upvotes: 2

Thomas Rbt
Thomas Rbt

Reputation: 1538

$sentence = "welcome to";
$string = "Hello and welcome to my website";

if( strstr($sentence, $string)) { 
    // Your code here if $sentence contains $string
} 
else{
    // If no contains
}

Upvotes: -1

Related Questions