CODEWITHSUNDEEP
php
olo
olo

Reputation: 5271

Best way to check if a string contains another string

$name are strings, contains file names are something like below,

AAA_ss_01.pdf, AAA_ss_02.pdf, AAA_sd_01.pdf, BBB_ss_02.pdf, BBB_ss_4.pdf, BBB_sd_01.pdf, cc_saa_01.pdf

I'd like to add an input name value to classify items automatically. 

<input name="AAA" .../> or <input name="BBB" .../> ........

PHP

if (strpos($names, 'AAA') !== false) {
    echo 'AAA';
}elseif (strpos($names, 'BBB') !== false){
    echo 'BBB';
}elseif (strpos($names, 'ccc') !== false){
    echo 'ccc';
}else{
    echo '';
}

I make a function like this 

function contains($names, $string){
    if (strpos($names, $string) !== false) {
        echo $string;
    }
}

but I am not sure if strpos is a right method I could use or there is a better one.

Thanks

Upvotes: 0

Views: 399

Answers (2)

Ohgodwhy
Ohgodwhy

Reputation: 50787

If you're just looking to make an input out of the first 3 letters, you can do it quickly using the following:

foreach($names as $name):
    echo '<input name="', substr($name, 0, 3) ,'" type="text"/>';
endforeach;

Upvotes: 1

Brandon - Free Palestine
Brandon - Free Palestine

Reputation: 16656

strpos is the correct method to check if string A contains string B. It is extremely fast. You may want to use stripos for case insensitive matching instead.

However, if $names is an array, you must iterate over it and check every value.

foreach ($names as $name) {
  if (strpos($name, 'AAA') !== false) {
    echo 'AAA';
  } elseif (strpos($name, 'BBB') !== false) {
    echo 'BBB';
  } elseif (strpos($name, 'ccc') !== false) {
    echo 'ccc';
  } else{
    echo '';
  }
}

Upvotes: 3

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