CODEWITHSUNDEEP
phpregexpreg-match
Marcelo Henriques Cortez
Marcelo Henriques Cortez

Reputation: 187

Remove non-numeric characters at the start of the string

I need to get the value from an input field, find the first number on it, and remove everything else BEFORE the number.

But I need to leave the number (and anything after it) as it is.

I tried some options, but couldn't do it.

Any ideas?

I managed to find where is the first number. But when I try to remove everything BEFORE it, I endup removing the first number as well, or removing another stuff (like periods and commas)

Here is how I got the first number position:

$stringPrice = '__.500,00';
if(preg_match('/[0-9]/', $stringPrice, $positionNum, PREG_OFFSET_CAPTURE)) {
    echo "First number is at " . $positionNum[0][1];
} else {
    echo "Invalid value";
}

Upvotes: 1

Views: 1181

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626738

Your current issue is to remove all non-numeric chars from the start of the string up to the first digit.

Use

preg_replace('/^\D+/', '', $stringPrice);

See the PHP demo

The ^ makes sure matching starts at the start of the string and \D+ matches one or more chars other than digits.

Upvotes: 3

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