Check if string starts with

Question

In PHP I have a list of country telephone codes. e.g: US 1, Egypt 20 ....
I need to check if a given string starts with 00[ANY NUMBER FROM THE LIST].
How can I achieve this and return the country code?

You could do this with regular expressions: http://www.regular-expressions.info/. — Felix Kling, May 28 '12 at 10:51
http://stackoverflow.com/questions/834303/php-startswith-and-endswith-functions — bos, May 28 '12 at 10:53
Or - if the numbers are strings - with `substr`: [substring info](http://www.php.net/manual/en/function.substr.php) — Tikkes, May 28 '12 at 10:53
Maybe the answer that was listed here: http://stackoverflow.com/questions/4979238/php-get-all-keys-from-a-array-that-start-with-a-certain-string — Sandeep Bansal, May 28 '12 at 10:54

score 6 · Accepted Answer · answered May 28 '12 at 11:18

6

$codes = array(1 => 'US', 20 => 'Egypt');
$phone = '002087458454';

foreach ($codes as $code => $country) {
  if (strpos($phone, "00$code") === 0)
    break;
}

echo $code;    // 20
echo $country; // Egypt

answered May 28 '12 at 11:18

flowfree

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1

You must check for `=== 0` instead of `== 0`. `strpos()` can return `FALSE` (string not found) and `FALSE == 0` is true!!! – Salman A May 28 '12 at 11:22

score 2 · Answer 2 · edited May 23 '17 at 12:27

2

Referring to PHP - get all keys from a array that start with a certain string

foreach ($array as $key => $value) {
    if (substr($value, 0, 2) == "00") {
        echo "$key\n";
    }
}

edited May 23 '17 at 12:27

Community

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1

answered May 28 '12 at 10:56

Sandeep Bansal

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nullpointr · Answer 3 · 2012-05-28T11:16:22.710

1

Use regular expressions:

$str ="0041";

if(preg_match('#00[0-9]+#', $str, $array)){
    echo substr($array[0], 2);
}

edited May 28 '12 at 11:16

answered May 28 '12 at 11:05

nullpointr

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18

It will echo the whole string. – flowfree May 28 '12 at 11:12
It will echo the first two chars now: `00`. – flowfree May 28 '12 at 11:17
Please note regex may have a performance impact in large data sets. – Jimmy Adaro Feb 01 '18 at 18:11

score 0 · Answer 4 · answered May 28 '12 at 10:54

0

Use the substr function:

$country_code = substr($string, 0, 2);

answered May 28 '12 at 10:54

fanf

110
1
7

score -1 · Answer 5 · edited May 28 '12 at 16:46

-1

Use explode function to separate the string in arrays, and you can acess with $string.

edited May 28 '12 at 16:46

j0k

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answered May 28 '12 at 10:54

Lucas Reis

441
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Check if string starts with

5 Answers5