I want to replace fields values that I get from a database query as an array of objects in a string like this:
"My name is {name} and I live in {city}."
I found the following solution but only works when I replace the values with normal strings, not with an object property:
preg_replace('/\{([a-z]+)\}/', "$row->\\1", $myString)
I get this error: Object of class stdClass could not be converted to string.
Why it can't evaluate $row->fielname?
Best regards.
You asked
Why it can't evaluate
$row->fielname?
for the following line of code:
preg_replace('/\{([a-z]+)\}/', "$row->\\1", $myString)
To better understand that, take a look at the string in question:
"$row->\\1"
Taking the rules of PHP double quoted string variable substitution into account, it will result in the following before the function is called:
***contents of the variable $row as string*** . '->\1'
If $row can not be converted to string (which can happen with objects), this will create a fatal error.
If $row contains the number 42 it will be this:
preg_replace('/\{([a-z]+)\}/', '42->\\1', $myString)
Hope this example is useful.
What you probably want to do is the following:
preg_replace_callback('/\{([a-z]+)\}/', function($groups) use ($row) {
return $row->{$groups[1]};
}, $myString);
