modify number in string php

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hi2all
i want to search for first number after comma and if match found replace second number with another number i specify it

my code is

PHP

$value='1 0 0,4 2 0,1 20 0,3 0 0,2 0 0,2 0 0,3 0 0,4 0 0,4 0 0,3 0 0,3 0 0,4 0 0,4 0 0,1 0 0,4 0 0,2 0 0,1 0 0,2 0 0,0 0 0,0 0 0,0 0 0,0 0 0,0 0 0,0 0 0,10 20 0,15 20 0,0 0 0,0 0 0,11 20 0,23 10 0,0 0 0,0 0 0,27 7 0,0 0 0,0 0 0,0 0 0,0 0 0,0 0 0,16 1 0,0 0 0';
$resouces_array=explode(',', $value);

foreach ($resouces_array as $key=> $value) {
    $first_number  =substr($value,0,2);
    $second_number   = explode(' ', $value);

    if($first_number == 23){
         $second_number[1]= 50;
     }

    //$first_parts= explode(' ', $value);
$string_valo= implode(' ' ,$second_number);
     $after_spli=str_pad($string_valo, 6,',');
     echo $after_spli;
}

i want the output to be like that

$value='1 0 0,4 2 0,1 20 0,3 0 0,2 0 0,2 0 0,3 0 0,4 0 0,4 0 0,3 0 0,3 0 0,4 0 0,4 0 0,1 0 0,4 0 0,2 0 0,1 0 0,2 0 0,0 0 0,0 0 0,0 0 0,0 0 0,0 0 0,0 0 0,10 20 0,15 20 0,0 0 0,0 0 0,11 20 0,23 50 0,0 0 0,0 0 0,27 7 0,0 0 0,0 0 0,0 0 0,0 0 0,0 0 0,16 1 0,0 0 0';

but my code produce that

1 0 0,4 2 0,1 20 03 0 0,2 0 0,2 0 0,3 0 0,4 0 0,4 0 0,3 0 0,3 0 0,4 0 0,4 0 0,1 0 0,4 0 0,2 0 0,1 0 0,2 0 0,0 0 0,0 0 0,0 0 0,0 0 0,0 0 0,0 0 0,10 20 015 20 00 0 0,0 0 0,11 20 023 50 00 0 0,0 0 0,27 7 00 0 0,0 0 0,0 0 0,0 0 0,0 0 0,16 1 00 0 0,

so what is wrong and is there any simple solution other mine ??

Posted 18-Sep-14 23:33pm

TheSniper105

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akhil tripathi · Accepted Answer · 2014-09-18T23:56:00

PHP

<?php
$value='1 0 0,4 2 0,1 20 0,3 0 0,2 0 0,2 0 0,3 0 0,4 0 0,4 0 0,3 0 0,3 0 0,4 0 0,4 0 0,1 0 0,4 0 0,2 0 0,1 0 0,2 0 0,0 0 0,0 0 0,0 0 0,0 0 0,0 0 0,0 0 0,10 20 0,15 20 0,0 0 0,0 0 0,11 20 0,23 10 0,0 0 0,0 0 0,27 7 0,0 0 0,0 0 0,0 0 0,0 0 0,0 0 0,16 1 0,0 0 0';
$resouces_array=explode(',', $value);

$output = '';
foreach ($resouces_array as $key => $value) {
    $number   = explode(' ', $value);

     if($number[0] == 23){
         $number[1] = 50;
     }

     $output .= implode(" ", $number). ",";
}

echo rtrim($output,",");