PHP判断单词是否在引号中

Question

How do I get PHP to tell if a word is inside quotation marks?

Example: Hi there, "my" name is ...

How do I find out if the word my is in quotation marks (double or single)?

<?php
if(isset($_POST['sub'])) {
    $str = $_POST['textarea'];
    // determine if the word "my" is in quotation marks from the $str
}

Answer 1

You want a regular expression that can detect the word you're searching for, wrapped in consistent quotes (same quote character each side).

Something like this

$word = 'my';
$quoteCharacters = ['"', "'"];
$expression = sprintf('/([%s])%s\1/i',
    implode($quoteCharacters), preg_quote($word));
// produces something like /(["'])my\1/i

if (preg_match($expression, $str)) {
    echo "Found '$word' quoted";
}

The \\1 is aback reference to match the same quote character as found previously.

Demo ~ https://3v4l.org/juHIi