php if string contains letters code example

Example 1: php check if string contains word

$myString = 'Hello Bob how are you?';
if (strpos($myString, 'Bob') !== false) {
    echo "My string contains Bob";
}

Example 2: how to check if a string contains a substring in php

$a = 'How are you?';

if (strpos($a, 'are') !== false) {
    echo 'true';
}

Example 3: if text contains word then in php

if (strpos($haystack,$needle) !== false) {
    echo "$haystack contains $needle";
}

Example 4: php check if string contains a char

$haystack = 'This is my haystack that we shall check'
$has_A = strpos($haystack, 'A') !== false;
$has_a = strpos($haystack, 'a') !== false;

Example 5: php check if string contains

// returns true if $needle is a substring of $haystack
function contains($haystack, $needle){
    return strpos($haystack, $needle) !== false;
}