Usage of php case-sensitive conversion functions (strtolower and strtoupper)
This article describes the usage of the case-sensitive conversion functions strtolower and strtoupper in php, which are frequently encountered in character
This article describes the use of Strtolower and Strtoupper in PHP for case conversion functions, which are often encountered in character handling issues. If you need a friend, refer to it.1, convert the string to the lowercase strtolower function:
[PHP source code reading] in strtolower and strtoupper function string operation functions, string case-sensitivity conversion is also a commonly used function, and its underlying implementation is relatively simple. let's take a look at it.
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1. Microtime ()Returns the contents of this format for microsecond secondsExample Output: 0.25139300 1138197510//Front is the microsecond section, but the unit is seconds. Back is the second.2. Memory_get_usageReturns the memory consumed by PHP in
This article mainly introduces about the PHP source two: About Strlen, Strtolower, Strtoupper, Ord, Chr function, has a certain reference value, now share to everyone, there is a need for friends can refer to
int strlen (String string)Returns the
Summary of commonly used string formatting functions in PHP, php functions. Summary of common string formatting functions in PHP. the formatting of php function strings is to process strings in a specific format. Generally, the data submitted to the
Common string operation functions in PHP development, and string functions in php development. Common string operation functions in PHP Development. string function 1 in php Development. concatenating string concatenation strings is one of the most
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