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<?php
 
$str = '1,4|a1,b4';
 
$out = call_user_func_array("array_combine", array_chunk(str_word_count($str, 1, '1234567890'), 2));
 
print_r( $out );

Success #stdin #stdout 0.02s 52472KB

stdin

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Standard input is empty

stdout

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Array
(
    [1] => a1
    [4] => b4
)

https://ideone.com/rT7Ir8

language:

PHP (php 7.3.5)

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public

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