For day 15 of 21 in the “PHP Function of the day” series, I’m going to look at array_flip(). As you might guess, this function “flips” the array so that the key is the value and the value is the key. Let’s take a look. <?php $joe = array(“fname”=>”Joe”,”lname”=>”Steinbring”,”website”=>”jws.dev”); print_r($joe); echo(“<br />”); print_r(array_flip($joe)); echo(“<br /><br />”); $foods …
Continue reading "PHP function of the day: array_flip()"For day 14 of 21 in the “PHP Function of the day” series, I’m going to look at date(). The function takes a required format and an optional timestamp and outputs a formatted date. Let’s take a look. <?php echo “This is the “.date(“d”).”th day of the month.”.”<br />”; echo “This is the “.date(“m”).”th month of the …
Continue reading "PHP function of the day: date()"For day 13 of 21 in the “PHP Function of the day” series, I’m going to look at rand(). This function generates a random integer. You can feed it a minimum value and a maximum value or let it generate a value without the limits. Let’s take a look. <?php echo(rand().'<br />’); echo(rand().'<br />’); echo(rand(0,9)); ?> …
Continue reading "PHP function of the day: rand()"For day 12 of 21 in the “PHP Function of the day” series, I’m going to look at md5(). This function calculates the md5 hash of the string you supply as input. Let’s take a look. <?php $input = “Joe is here”; echo md5($input).”</br >”; $input = “Joe was here”; echo md5($input).”</br >”; $input = “Joe is …
Continue reading "PHP function of the day: md5()"For day 11 of 21 in the “PHP Function of the day” series, I’m going to look at array_diff(). It gets the difference between an array and one or more other arrays. Let’s take a look. <?php $person1 = array(“fname”=>”Joe”,”lname”=>”Smith”); $person2 = array(“fname”=>”Jane”,”lname”=>”Smith”); $differences = array_diff($person1, $person2); print_r($differences); $person3 = array(“fname”=>”Stan”,”lname”=>”Smith”); $differences = array_diff($person1, $person2, $person3); print_r($differences); …
Continue reading "PHP function of the day: array_diff()"For day 10 of 21 in the “PHP Function of the day” series, I’m going to look at time(). It simply gets the number of seconds elapsed since the Unix Epoch. Let’s take a look. <?php echo ‘It has been ‘.time().’ seconds since January 1 1970 00:00:00 GMT’; ?> See the output This has pretty …
Continue reading "PHP function of the day: time()"For day 9 of 21 in the “PHP Function of the day” series, I’m going to look at min(). This function takes values and returns the smallest value from what you provided. Let’s take a look. <?php echo(min(-1,0,1,2,3).'<br />’); echo(min(array(-1,0,1,2,3)).'<br />’); echo(min(array(‘a’,’b’,’c’,’d’))); ?> See the output As you can see, this is a lot like …
Continue reading "PHP function of the day: min()"For day 8 of 21 in the “PHP Function of the day” series, I’m going to look at html_entity_decode(). It takes HTML entities and converts them to HTML. Let’s take a look. <?php $html = ‘<h1>Hello!</h1><p>Joe\’s website is at: <a href=”https://jws.dev”>jws.dev</a></p>’; $encoded = htmlentities($html); echo $encoded.'<br />’; echo html_entity_decode($encoded); ?> See the output As you …
Continue reading "PHP function of the day: html_entity_decode()"For day 7 of 21 in the “PHP Function of the day” series, I’m going to look at htmlentities(). It takes HTML as an input and converts it to HTML entities. Let’s take a look. <?php $html = ‘<h1>Hello!</h1><p>Joe\’s website is at: <a href=”https://jws.dev”>jws.dev</a></p>’; echo ‘<br />’; echo $html; echo ‘<br />’; echo htmlentities($html); ?> See …
Continue reading "PHP function of the day: htmlentities()"For day 6 of 21 in the “PHP Function of the day” series, I’m going to look at json_decode(). You might remember json_encode() from last week. Where json_encode() encodes data as JSON, json_decode() decodes JSON data. Let’s take a look. <?php $data = ‘{“First_Name”:”Joe”,”Last_Name”:”Steinbring”,”Website”:”jws.dev”}’; var_dump($data); echo(‘<br />’); var_dump(json_decode($data)); echo(‘<br />’); var_dump(json_decode($data, true)); ?> See the output …
Continue reading "PHP function of the day: json_decode()"