There are no caveats as such while using the PHP trim() function. The output for this code snippet would be the following: e freelance developeĪs you can see the “hir” from “Hire” and the “r” from “developer” were removed. Now let’s look at a case where we pass a second argument. The output for the above code snippet would be as follows: Hire freelance developer If left empty, all the characters mentioned below would be removed.Ī modified string with whitespaces or the specified characters removed from both sides is returned. This parameter specifies the character that needs to be removed from the string. This is the string or the variable containing the string from which you want to remove whitespaces or characters. Post that we look at a code snippet using the trim() function. ![]() ![]() In this section, we look at the various syntax, parameters, and return values used in the trim() function. However, making use of just the trim() function without specifying ‘l’ or ‘ r’ removes characters from both sides. Ltrim () and rtrim () are used to remove these whitespaces or other characters from the left and right sides of the string. Implode looks at the first array, and once it sees that the first array has many arrays in it, it throws an error.The trim() function in PHP removes whitespace or any other predefined character from both the left and right sides of a string. It doesn’t work that way because implode() only works with flat arrays ( ) instead of multidimensional arrays ( ]). We looked at how the implode() function works with both indexed and associative arrays, too, with examples.ĭon’t forget that implode() doesn’t work with nested arrays (multidimensional arrays). In this article, you learned about the implode() function in PHP and how it works. You can use the PHP View Chrome extension to format your printed array so it can look better: To prove that the original array is never modified, I’ll print the array alongside the imploded variables: "Kolade", $newPersonKeys = implode(", ", array_keys($person)) $newPersonValues = implode(", ", $person)."" To print the indexes too, you need to attach the array to the array_keys() method while printing the array: "Kolade", You can see the indexes were not printed. Let’s see how implode() works with associative arrays. You define a named index with an associative array. ![]() Examples of Implode with an Associative Array You can see it’s better to specify a separator so you can see the values well. In the example below, I passed in an empty space, comma, and hyphen as separators: "."" Note that I did not pass in a separator and implode() still works fine. You can also assign the indexes if you want.īelow is an example of how implode() works with an indexed array: In PHP, an indexed array is what it sounds like – each value in the array has an index automatically assigned to it. Examples of Implode with an Indexed Array In the syntax above, an empty space (" ") is the separator, and $array is the array. The full syntax of an implode() looks like this: implode(" ", $array) NB: implode() doesn’t work with nested arrays. The array on the other hand could be an associative array or an indexed array. If you don’t pass in the separator, implode() still works. It is valid as long as you specify it in quotes. The separator could be any character or an empty string. Implode() takes in two values as parameters – the separator and the array you want to convert to a string. ![]() Once you pass in the array to implode(), it joins all the values to a string. It doesn’t matter whether the array is an indexed or associative array. implode() doesn’t modify the original array. In PHP, the implode() function is a built-in function that takes an array and converts it to a string.
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