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strtok in PHP |
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(PHP 4, PHP 5)
strtok — Tokenize string Description string strtok ( string $str, string $token ) strtok() splits a string (str) into smaller strings (tokens), with each token being delimited by any character from token. That is, if you have a string like "This is an example string" you could tokenize this string into its individual words by using the space character as the token. <?php $string = "This is\tan example\nstring"; /* Use tab and newline as tokenizing characters as well */ $tok = strtok($string, " \n\t"); while ($tok !== false) { echo "Word=$tok<br />"; $tok = strtok(" \n\t"); } ?> Note that only the first call to strtok uses the string argument. Every subsequent call to strtok only needs the token to use, as it keeps track of where it is in the current string. To start over, or to tokenize a new string you simply call strtok with the string argument again to initialize it. Note that you may put multiple tokens in the token parameter. The string will be tokenized when any one of the characters in the argument are found. The behavior when an empty part was found changed with PHP 4.1.0. The old behavior returned an empty string, while the new, correct, behavior simply skips the part of the string: <?php $first_token = strtok('/something', '/'); $second_token = strtok('/'); var_dump($first_token, $second_token); ?> Output: string(0) "" string(9) "something" <?php $first_token = strtok('/something', '/'); $second_token = strtok('/'); var_dump($first_token, $second_token); ?> Output: string(9) "something" bool(false) Warning This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE, such as 0 or "". Please read the section on Booleans for more information. Use the === operator for testing the return value of this function. Doing for this function is string Add by Pancho You can edit it here |
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