How To Test Whether A String Contains Another String In PHP

The most direct and simplest answer is to use the php function strstr and strpos

For example:
strstr

$a = “what is the cost of property insurance?”;
if (strstr($a, “insurance”))
{
echo “insurance was found in the string”;
}

strpos
As per the php documentation, there’s a better function to use apart from strstr, and that’s strpos (case sensitive) or stripos (case insensitive)

$a = “what is the cost of property insurance?”;
if (strpos($a, “insurance”)!==false)
{
echo “insurance was found in the string”;
}

Notice that the test operator used in the if condition is !== (not !=)