Write a php script to check whether a string contains a specific string

The specific word is present.

PHP: Tips of the Day

PHP: How to use array_filter[] to filter array keys?

PHP 5.6 introduced a third parameter to array_filter[], flag, that you can set to ARRAY_FILTER_USE_KEY to filter by key instead of value:

$my_array = ['foo' => 1, 'hello' => 'world'];
$allowed  = ['foo', 'bar'];
$filtered = array_filter[
    $my_array,
    function [$key] use [$allowed] {
        return in_array[$key, $allowed];
    },
    ARRAY_FILTER_USE_KEY
];

Clearly this isn't as elegant as array_intersect_key[$my_array, array_flip[$allowed]], but it does offer the additional flexibility of performing an arbitrary test against the key, e.g. $allowed could contain regex patterns instead of plain strings.

You can also use ARRAY_FILTER_USE_BOTH to have both the value and the key passed to your filter function. Here's a contrived example based upon the first, but note that I'd not recommend encoding filtering rules using $allowed this way:

$my_array = ['foo' => 1, 'bar' => 'baz', 'hello' => 'wld'];
$allowed  = ['foo' => true, 'bar' => true, 'hello' => 'world'];
$filtered = array_filter[
    $my_array,
    function [$val, $key] use [$allowed] { // N.b. $val, $key not $key, $val
        return isset[$allowed[$key]] && [
            $allowed[$key] === true || $allowed[$key] === $val
        ];
    },
    ARRAY_FILTER_USE_BOTH
]; // ['foo' => 1, 'bar' => 'baz']

Ref : //bit.ly/3iUn1l5

Topic: PHP / MySQLPrev|Next

Answer: Use the PHP strpos[] Function

You can use the PHP strpos[] function to check whether a string contains a specific word or not.

The strpos[] function returns the position of the first occurrence of a substring in a string. If the substring is not found it returns false. Also note that string positions start at 0, and not 1.

Let's check out an example to understand how this function basically works:

Related FAQ

Here are some more FAQ related to this topic:

• How to count how many times a substring occurs in a string in PHP
• How to replace a word inside a string in PHP
• How to split a string into an array in PHP

strpos[$original_string,$sub_string];

True

False

True

False

How do you check if a string contains a string in PHP?

How will you search a string in PHP?

Does string contain PHP?

How do you check if a string starts with a substring in PHP?