[SOLVED] return part of a string

[n8w]

I want to dynamically search a string.

So if $id=339;

I would like it to return the number after the ":" which would be "3"

 

What is the best way to do this?

 

 

$id=339;
$str="338:1, 339:3 ,340:15";

 

[GingerRobot]

Well if you're going to need to search the same string multiple times, i'd build an array:

 

<?php
$id=339;
$str="338:1, 339:3 ,340:15";

$pieces = explode(",",$str);
$array = array();
foreach($pieces as $piece){
    $piece = trim($piece);
    list($key,$value) = explode(":",$piece);
    $array[$key] = $value;
}

//can then access based on id
if(isset($array[$id]){
    echo $array[$id];
}else{
    echo "That id doesn't exist!";
}
?>

 

If it's just the once, a regex would be neater.

 

Edit: e.g:

 

<?php
$id=359;
$str="338:1, 339:3 ,340:15";
preg_match("|$id:([0-9]+)|",$str,$matches);
if(count($matches) > 0){
    echo $matches[1];
}else{
    echo "That ID doesn't exist!";
}
?>

[n8w]

this is so great! thanks

[GingerRobot]

No problem.

 

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