<?php
$search_array = array('key1' => 17, 'key2' => 74);
if (array_key_exists('key1', $search_array)) {
echo "The key 'key1' exists ";
}
//The key 'key1' exists
?>
Tag Archives: String functions
Function to find out the number of occurrence elements in an array -PHP
<?php
$testArray=array("Value1","Value1","Value1","Value2");
print_r(array_count_values($testArray));
//Array ( [Value1] => 3 [Value2] => 1 )
?>
Creates an array by using one array for keys and another for its values – PHP
<?php
$testArray1 = array('key1', 'key2', 'key3');
$testArray2 = array('value1', 'value2', 'value3');
$testArray3 = array_combine($testArray1, $testArray2);
print_r($testArray3);
//Array ( [key1] => value1 [key2] => value2 [key3] => value3 )
// NOTE : Make sure that the 2 arrays have equual
// number of elements
?>
Function to combine arrays – PHP
<?php
$testArray1 = array("place" => "kochi", 11, 12);
$testArray2 = array("p", "s", "place" => "Tvm", "Width" => "10", 84);
$testArray3 = array_merge($testArray1, $testArray2);
print_r($testArray3);
//Array ( [place] => Tvm [0] => 11 [1] => 12 [2] => p [3]
//=> s [Width] => 10 [4] => 84 )
?>
Convert the values of an array into uppercase – PHP
<?php
$testArray = array("Value1","Value2", "Value3");
print_r(array_map('strtoupper', $testArray));
// Array ( [0] => VALUE1 [1] => VALUE2 [2] => VALUE3 )
?>
Convert the keys of an array into uppercase – PHP
<?php
$testArray=array("key1"=>"Value1","key2"=>"Value2","key3"=>"Value3");
print_r(array_change_key_case($testArray,CASE_UPPER));
//Array ( [KEY1] => Value1 [KEY2] => Value2 [KEY3] => Value3 )
?>
Apply a function to all the element of an array – PHP
<?php
$testArray = array(2.4, 2.6, 3.5);
print_r(array_map('ceil', $testArray));
// Array ( [0] => 3 [1] => 3 [2] => 4 )
$testArray = array(2.4, 2.6, 3.5);
print_r(array_map('floor', $testArray));
// Array ( [0] => 2 [1] => 2 [2] => 3 )
?>
Validate Email address – PHP
if (!preg_match('|^http(s)?://[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(/.*)?$|i', $cUrls)) $errorList[]="Invalid Client url - $cUrls. ' ";
echo "Invalid url";
Validate website address – PHP
<?php
if (!preg_match("/^(http(s?)://|ftp://{1})
((w+.){1,})w{2,}$/i", $websitrAddres))
$errorList[]="Invalid Website address. ' ";
?>
How to check whether a variable is an array – PHP
<?php
$array = array('this', 'is', 'an array');
echo is_array($array) ? 'True' : 'False'; // True
echo " ";
$var = 'this is a string';
echo is_array($no) ? 'True' : 'False'; // False
?>