What alternative functions or methods in PHP can be used to check for the presence of a string within another string without using regex?

When checking for the presence of a string within another string in PHP without using regex, one common approach is to use the strpos() function. This function returns the position of the first occurrence of a substring within a string, or false if the substring is not found. Another method is to use the strstr() function, which returns the part of the string from the first occurrence of a substring to the end of the string, or false if the substring is not found. 

// Using strpos() function
$mainString = "Hello, World!";
$subString = "Hello";

if(strpos($mainString, $subString) !== false) {
    echo "Substring found in the main string.";
} else {
    echo "Substring not found in the main string.";
}

// Using strstr() function
$mainString = "Hello, World!";
$subString = "World";

if(strstr($mainString, $subString)) {
    echo "Substring found in the main string.";
} else {
    echo "Substring not found in the main string.";
}

Keywords

strpos stripos strstr stristr substr_count

Related Questions