{"id":6094,"date":"2018-06-24T12:58:55","date_gmt":"2018-06-24T12:58:55","guid":{"rendered":"https:\/\/www.jquery-az.com\/?p=6094"},"modified":"2024-02-29T10:12:32","modified_gmt":"2024-02-29T10:12:32","slug":"php-string-uppercase-lowercase","status":"publish","type":"post","link":"https:\/\/www.jquery-az.com\/php-string-uppercase-lowercase\/","title":{"rendered":"Built-in Functions for Uppercase, Lowercase and Camel case in PHP"},"content":{"rendered":"

In different situations, you may require making a string completely uppercase or lowercase or camelcase letters i.e. capitalize the first letter of each word.<\/p>\n

PHP provides built-in functions for that. The functions are given below which are followed by examples of using them.<\/p>\n\n\n\n\n\n\n\n\n
Function\u00a0<\/strong><\/td>\nDescription<\/strong><\/td>\n<\/tr>\n
strtoupper()<\/strong><\/td>\nstrtoupper() function\u2013 For making a PHP string uppercase (all letters in the string)<\/td>\n<\/tr>\n
strtolower()<\/strong><\/td>\nstrtolower() function \u2013 that converts a specified string to lowercase letters.<\/td>\n<\/tr>\n
ucwords()<\/strong><\/td>\nucwords() \u2013 camel cased i.e. capitalizes the first letter of each word in a string.<\/td>\n<\/tr>\n
ucfirst()<\/strong><\/td>\nFor making the first letter of a string capital, use the ucfirst() function of PHP.<\/td>\n<\/tr>\n
lcfirst()<\/strong><\/td>\nTo make the first letter lowercased, use the lcfirst()<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The next section shows you the examples of each function with a little more details.<\/p>\n

PHP uppercase conversion by strtoupper<\/strong> function<\/strong><\/h3>\n

In the first example, a string variable is created with mixed-letter text.<\/p>\n

The strtoupper function is used and that string variable is specified for converting all letters to capitals.<\/p>\n

See the code and output:<\/p>\n

<?php\r\n\r\n$str_upper = \"Capitalize all letters\";\r\n\r\necho strtoupper($str_upper);\r\n\r\n?><\/pre>\n
Output of the above code is:<\/strong><\/p>\n
CAPITALIZE ALL LETTERS<\/div>\n
Convert to small letter example by strtolower function<\/strong><\/h3>\n
This example changes the case of all letters to small case letters. The given string is assigned the text with mixed case letters. Have a look at the code and output:<\/p>\n
<?php\r\n\r\n$str_mixed = \"SmaLL letters ExamPle\";\r\n\r\necho strtolower($str_mixed);\r\n\r\n?><\/pre>\n
Output:<\/strong><\/p>\n
small letters example<\/div>\n
Making the first letter of each word capital example<\/strong><\/h3>\n
Use the ucwords() function for making the first letter of each word capital in the given string. The following example shows how:<\/p>\n
Oode:<\/strong><\/p>\n
<?php\r\n\r\n$str_first_cap = \"hang on, this is first letter capital example!\";\r\n\r\necho ucwords($str_first_cap);\r\n\r\n?><\/pre>\n
The output:<\/strong><\/p>\n
Hang On, This Is First Letter Capital Example!<\/div>\n
First letter capital in a string<\/strong><\/p>\n
The ucfirst() function converts only the first letter of the specified string to capital.<\/p>\n
Be noted that, if your string contains multiple sentences then this function still converts only the first letter of the string rather than all sentences.<\/div>\n
A demo is shown below where I used multiple sentences:<\/p>\n
<?php\r\n\r\n$str_cap_one = \"this is php. php is cool. php is simple.\";\r\n\r\necho ucfirst($str_cap_one);\r\n\r\n?><\/pre>\n
The output:<\/strong><\/p>\n
This is php. php is cool. php is simple.<\/div>\n
Similarly, you may use the lcfirst()<\/em><\/strong> function for making the first letter to lowercase.<\/div>\n","protected":false},"excerpt":{"rendered":"
PHP provides built-in functions for uppercase, lowercase and camel case conversion. This tutorial explains how to use these with examples.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[9],"tags":[],"yoast_head":"\nHow to make PHP string uppercase, lowercase, capitalize first letter<\/title>\n<meta name=\"description\" content=\"PHP provides built-in functions for uppercase, lowercase and camel case conversion. 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