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PHP script to get all keys from an array that starts with a certain string
Method 1
$arr_main_array = array('test_val' => 123, 'other-value' => 456, 'test_result' => 789); foreach($arr_main_array as $key => $value){ $exp_key = explode('-', $key); if($exp_key[0] == 'test'){ $arr_result[] = $value; } } if(isset($arr_result)){ print_r($arr_result); }
Method 2
A functional approach An array_filter_key type of function is taken, and applied to the array elements $array = array_filter_key($array, function($key) { return strpos($key, 'foo-') === 0; });
Method 3
A procedural approach −
$val_1 = array(); foreach ($array as $key => $value) { if (strpos($key, 'foo-') === 0) { $val_1[$key] = $value; } }
Method 4
A procedural approach using objects −
Example
$i = new ArrayIterator($array); $val_1 = array(); while ($i->valid()) { if (strpos($i->key(), 'foo-') === 0) { $val_1[$i->key()] = $i->current(); } $i->next(); }
Output
This will produce the following output −
Array(test_val => 123 test_result => 789)
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