how to exclude everything but numbers in php?

Question

Possible Duplicate:
PHP code to remove everything but numbers

i have a loop that returns some content and i want to filter so that i get back only numbers:

foreach ($number as $k => $content) {
    echo "<td>" . $content . "</td>";
}

this will return:

Sender Number,,
1818233483,, - aaa
1562595441,, - aaa
1870750493,, - aaa
1832677004,, - aaa
1832466803,, - aaa

and i want to do some king of regexp or something so i will filter only the numbers:

also i'm not sure what characters might be there so i need to check for everything but numbers.

any ideas? thanks

edit: i did this: $test = preg_replace("/[^0-9]/", "", $content);

but i get:

Sender Number,,
1818233483
1562595441
1870750493
..

explode on the comma, or if the length is fixed substr(), regex would be over kill — , Dec 20 '11 at 02:03
Does this answer your question? http://stackoverflow.com/questions/6604455/php-code-to-remove-everything-but-numbers — VikingBadger, Dec 20 '11 at 02:05

Léon Rodenburg · Accepted Answer · 2011-12-20T02:16:27.510

3

Use this:

foreach ($number as $k => $content) {
    echo "<td>" . preg_replace( '/[^0-9]/', '', $content) . "</td>";
}

Edit: try this to remove the Sender Number,,

foreach($number as $k => $content) {
    if(is_numeric(substr($content, 0, 4)) {
        echo "<td>" . preg_replace( '/[^0-9]/', '', $content) . "</td>";
    }
}

edited Dec 20 '11 at 02:16

answered Dec 20 '11 at 02:01

Léon Rodenburg

4,894
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18

i still get the first line `Sender Number,,`. I need to remove all strings from the result – Patrioticcow Dec 20 '11 at 02:09
Are you sure the Sender Number,, is the first element in $number and not hard coded? – Léon Rodenburg Dec 20 '11 at 02:12

score 2 · Answer 2 · answered Dec 20 '11 at 02:02

Try replacing every character that's not a digit with nothing, using preg_replace

foreach ($number as $k => $content) {
    echo "<td>" . preg_replace( '/[^0-9]/', '', $content) . "</td>";
}

A more efficient approach might be to do string processing on the comma, like so:

foreach ($number as $k => $content) {
    echo "<td>" . substr($content, 0, strpos( $content, ',')) . "</td>";
}

how to exclude everything but numbers in php?

2 Answers2