strpos() with multiple needles?

user_861209 0
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I am looking for a function like strpos() with two significant differences:

  1. To be able to accept multiple needles. I mean thousands of needles at ones.
  2. To search for all occurrences of the needles in the haystack and to return an array of starting positions.

Of course it has to be an efficient solution not just a loop through every needle. I have searched through this forum and there were similar questions to this one, like:

but nether of them was what I am looking for. I am using strpos just to illustrate my question better, probably something entirely different has to be used for this purpose.

I am aware of Zend_Search_Lucene and I am interested if it can be used to achieve this and how (just the general idea)?

Thanks a lot for Your help and time!

strpos full-text-indexing full-text-search php
6 Answers

How about a simple solution using array_map()?

$string = 'one two three four';
$needles = array( 'five' , 'three' );

$strpos_arr = array_map( function ( $check ) use ( $string ) {
    return strpos( $string, $check );
}, $needles );

As return, you're going to have an array where the keys are the needles positions and the values are the starting positions, if found.

//print_r( $strpos_arr );
Array
(
    [0] => 
    [1] => 8
)
user_11930380
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