am I using strpos correctly? Not getting the results

Question

I've got a php while loop going (creating a search script), and I'm looking to match up values to see which items should go into the search results. strpos seems to work just fine until all of a sudden when it refuses to work correctly on this particular spot...

if (strpos('a', 'a')) {
 continue;
}

Shouldn't that NOT reach continue? "a" does contains "a" after all, but in my script it's reaching the continue.

Could you show the surrounding code as this does as its intended to, and doesnt run the 'continue'.. so we'll need to see the surrounding. — Darren, Aug 29 '15 at 04:46
It returns [the position](http://stackoverflow.com/a/4192039/3110638), which is `0`=`false`. Just use `if(strpos('a', 'a') !== false)` — Jonny 5, Aug 29 '15 at 05:05

score 1 · Answer 1 · edited Jun 20 '20 at 09:12

All is ok, just try this codes:

<?php

$value = strpos('qa', 'a');
var_dump($value);

if($value) {
 echo "inside\n<br>";
}

Output:

int(1)

inside

<?php
$value = strpos('aq', 'a');
var_dump($value);

if($value) {
 echo "inside\n<br>";
}

Output:

int(0)

In the second code $value is evaluate as false (boolean) in the typecast, because the position of a is 0 and when you evaluate 0 inside the if() the value is casting to false.

You should use this code:

if(strpos('a', 'a') === 0) {
 echo "inside\n<br>";
}

Output:

inside

You can read more at:

http://php.net/strpos

http://php.net/manual/en/language.operators.comparison.php

am I using strpos correctly? Not getting the results

1 Answers1