PHP check for string inside string

Question

I have variable x and I want to see if it contains a string like hs even though the value may be cug hs ib ap. Can anybody help me figure this out? Thanks!

SlavaNov · Accepted Answer · 2011-12-16 22:39:42Z

1

PHP strstr

<?php
  $x  = 'cug hs ib';
  $y = strstr($x, 'hs');
  echo $y; 
?>

Update: Better user strpos

<?php
  $x  = 'cug hs ib';
  $y = strpos($x, 'hs');
  if($y === false)
      // Not a substring
  else
      // Substring

?>

answered Dec 16, 2011 at 22:39

SlavaNov

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4 Comments

Joe Torraca Over a year ago

what is the difference between strstr + strpos?

SlavaNov Over a year ago

strstr returns the string starting from the first occurrence while strpos returns number (the position) of the substring

Michael Robinson Over a year ago

@JosephTorraca: strstr finds the first occurrence of a substring within a string, returning the string from that index unless the third parameter is set to true. strpos returns the index of the first character of the first occurrence of a substring or false if not found.

SlavaNov Over a year ago

@Michael Robinson: Good explanation, but don't forget that third parameter in strstr is for PHP 5.3.0

user142162 · Accepted Answer · 2011-12-16 22:39:55Z

1

if(strpos($big_string, $sub_string) !== false)
{
    // $big_string contains $sub_string
}

answered Dec 16, 2011 at 22:39

user142162

Comments

Michael Robinson · Accepted Answer · 2011-12-16 22:40:00Z

1

You could use strpos

if (strpos($haystack, $needle) !== false) {
    echo "the string '{$needle}' was found within '{$haystack}'";
}

answered Dec 16, 2011 at 22:40

Michael Robinson

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Comments

user862010 · Accepted Answer · 2011-12-16 22:40:03Z

1

You could use substr_count .. http://php.net/substr_count or strpos, http://php.net/strpos

answered Dec 16, 2011 at 22:40

user862010

1 Comment

Joe Torraca Over a year ago

thanks for providing the link, I tried google'ing it and found nothing

Ben D · Accepted Answer · 2011-12-16 22:41:05Z

1

Either strpos() or stripos() (depending on whether you're interested in case sensitivity).

http://php.net/manual/en/function.strpos.php

answered Dec 16, 2011 at 22:41

Ben D

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