php string how to find one number in a string of numbers

Question

Possible Duplicate:
How can I check if a word is contained in another string using PHP?

I wish to have some PHP code to check if a certain number appears in a string of numbers, so for example how do I check if the number 7 appears in the number 3275?

I have tried strcmp but I can't work this one out :(

score 3 · Accepted Answer · answered Sep 06 '12 at 07:42

3

Try this code:

$pos = strrpos($mystring, "7");
if ($pos === false) { // note: three equal signs
    // not found...
}
else{
    //string found
}

answered Sep 06 '12 at 07:42

Alessandro Minoccheri

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Note that 'strrpos' find the last occurance, as opposed to 'strpos' which finds the first appearance. Either function will for this use case. – Omn May 25 '13 at 17:22

score 2 · Answer 2 · answered Sep 06 '12 at 07:42

2

Have a look at strpos; you can use it to find where a substring occurs in a string (and, by extension, whether it occurs). See the first example for how to do the check correctly.

answered Sep 06 '12 at 07:42

Will Vousden

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score 2 · Answer 3 · answered Sep 06 '12 at 07:43

strpos() is your friend, php is not strongly typed, so you can consider numbers as strings.

$mystring = 3232327;
$findme   = 7;
$pos = strpos($mystring, $findme);

if ($pos === false) {
    echo "The number '$findme' was not found in the number '$mystring'";
} else {
    echo "The number '$findme' was found in the number '$mystring'";
    echo " and exists at position $pos";
}

score 1 · Answer 4 · answered Sep 06 '12 at 07:42

http://us3.php.net/strpos

int strpos ( string $haystack , mixed $needle [, int $offset = 0 ] )

Find the numeric position of the first occurrence of needle in the haystack string.

make sure you use " !== false" when comparing the return value to see if it exists (otherwise 7325 would return position 0 and 0 == false) - === and !== are compare value AND type (boolean vs integer)

Sherlock · Answer 5 · 2012-09-06T07:49:07.997

0

if(stristr('3275', '7') !== false)
{
  // found
}

edited Sep 06 '12 at 07:49

answered Sep 06 '12 at 07:42

Sherlock

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`if(stristr("3275","7") !== false) { // found }` – rynhe Sep 06 '12 at 07:47

score 0 · Answer 6 · answered Sep 06 '12 at 07:48

0

Try like this

$phno = 1234567890;
$collect = 4;
$position = strpos($phno, $collect);

if ($position)
    echo 'The number is found at the position'.$position;   
else
    echo 'Sorry the number is not found...!!!';

answered Sep 06 '12 at 07:48

GautamD31

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php string how to find one number in a string of numbers

6 Answers6