STATS_HARMONIC_MEAN(3) 1 STATS_HARMONIC_MEAN(3)stats_harmonic_mean - Returns the harmonic mean of an array of valuesSYNOPSIS
number stats_harmonic_mean (array $a)
DESCRIPTION
Warning
This function is currently not documented; only its argument list is available.
PARAMETERS
o $a
-
RETURN VALUES PHP Documentation Group STATS_HARMONIC_MEAN(3)
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ARRAY_SEARCH(3) 1 ARRAY_SEARCH(3)array_search - Searches the array for a given value and returns the corresponding key if successfulSYNOPSIS
mixed array_search (mixed $needle, array $haystack, [bool $strict = false])
DESCRIPTION
Searches $haystack for $needle.
PARAMETERS
o $needle
- The searched value.
Note
If $needle is a string, the comparison is done in a case-sensitive manner.
o $haystack
- The array.
o $strict
- If the third parameter $strict is set to TRUE then the array_search(3) function will search for identical elements in the
$haystack. This means it will also check the types of the $needle in the $haystack, and objects must be the same instance.
RETURN VALUES
Returns the key for $needle if it is found in the array, FALSE otherwise.
If $needle is found in $haystack more than once, the first matching key is returned. To return the keys for all matching values, use
array_keys(3) with the optional $search_value parameter instead.
Warning
This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE. Please read the section on
Booleans for more information. Use the === operator for testing the return value of this function.
CHANGELOG
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 5.3.0 | |
| | |
| | As with all internal PHP functions as of 5.3.0, |
| | array_search(3) returns NULL if invalid parame- |
| | ters are passed to it. |
| | |
| 4.2.0 | |
| | |
| | Prior to PHP 4.2.0, array_search(3) returns NULL |
| | on failure instead of FALSE. |
| | |
+--------+---------------------------------------------------+
EXAMPLES
Example #1
array_search(3) example
<?php
$array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red');
$key = array_search('green', $array); // $key = 2;
$key = array_search('red', $array); // $key = 1;
?>
SEE ALSO array_keys(3), array_values(3), array_key_exists(3), in_array(3).
PHP Documentation Group ARRAY_SEARCH(3)
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