The tanh() function returns the hyperbolic tangent of the specified value.Syntaxtanh(val)Parametersval − A value in radiansReturnThe tanh() function returns the hyperbolic tangent of the specified value val.ExampleThe following is an example to get the hyperbolic tangent of 0 and 1: Live DemoOutput00.76159415595576ExampleLet us see an example to get the hyperbolic tangent of constant M_PI_4 − Live DemoOutput0.65579420263267ExampleLet us see an example to get the hyperbolic tangent of values 0.50 and -0.50 − Live DemoOutput0.46211715726001-0.46211715726001ExampleLet us see another example to get the hyperbolic tangent of negative values − Live DemoOutput-0.9999092042626-0.99999999587769

The tan() function returns the tangent of the specified value.Syntaxtan(val)Parametersval − A value in radiansReturnThe tan() function returns the tangent of the specified value val.Example Live DemoOutput01.5574077246549ExampleLet us see another example − Live DemoOutput1ExampleLet us see another example − Live DemoOutput0.54630248984379-0.54630248984379ExampleLet us see another example − Live DemoOutput3.3805150062466-0.64836082745909

The mt_srand() function seeds the random number generator.Note − Random number generator is seeded automatically after the release of PHP 4.2.0. This function is not needed now.Syntaxsrand(seed)Parametersseed − The seed valueReturnThe srand() function Returns nothing.Example Live DemoOutput664617053ExampleLet us see another example − Live DemoOutput4

The sqrt() function Returns the square root of a number.Syntaxsqrt(num)Parametersnum − The number for which you want to find the square rootReturnThe sqrt() function Returns the square root of the specified number.Example Live DemoOutput4ExampleLet us see another example − Live DemoOutput0.5ExampleLet us see another example − Live DemoOutputNAN

The sinh() function Returns the hyperbolic sine of a number equivalent to.(exp(num) - exp(-num))/2)Syntaxsinh(num)Parametersnum − The number for which you want to Return the hyperbolic sine. A value in radians.ReturnThe sinh() function Returns the hyperbolic sine of a number.Example Live DemoOutput01.1752011936438ExampleLet us see another example − Live DemoOutput11.5487393572582.3012989023073

The zip_read() function reads the next entry in a ZIP file archive.Syntaxzip_read(zip)Parameterszip − The zip resource to readReturnThe zip_read() function returns a resource containing a file within the zip archive on success.ExampleThe following is an example, wherein we have a zip file "new.zip", with the following files.amit.txt peter.txt result.html demo.java settings.iniExampleLet us now see the example:OutputFile Name = amit.txt File Name = peter.txt File Name = result.html File Name = demo.java File Name = settings.ini

The zip_open() function opens a zip file for reading. It returns an open zip file on success and FALSE on failure.Syntaxzip_open(zip_file)Parameterszip_file − The path of the file to be opened.ReturnThe zip_open() function returns an open zip file on success and FALSE on failure.ExampleOutputCompressed: 90 Compressed: 12 Compressed: 67

The zip_entry_read() function is used to get the contents from an open zip archive file.Syntaxzip_entry_read(zip_entry, len)Parameterszip_entry − The zip entry resource. Required.len − The length in bytes. The default is 1024.ReturnThe zip_entry_read() function Returns the contents from an open zip archive file. Returns FALSE on failure.ExampleThe following is an example. Let’s say our zip file "one.zip" is having only a single file i.e. "detail.txt" with the following content.Asia is a continent!Let us see an example −ExampleOutputText in the file = Asia is a continent!Read More

The zip_entry_open() function is used to open a zip archive entry for reading.Syntaxzip_entry_open(zip_file,zip_entry,mode)Parameterszip_file − The zip file to be readzip_entry − The zip entry to open.mode − The type of access needed for zip archiveReturnThe zip_entry_open() function Returns TRUE on success, or FALSE on failure.Example

The zip_entry_name() function returns the name of the zip archive file.Syntaxzip_entry_name(zip_entry)Parameterszip_entry − A zip file opened with zip_open() is to be mentioned here.ReturnThe zip_entry_name() function returns the name of the zip archive file.The following is an example. Let’s say we have 5 files in the zip archive "new.zip".ExampleOutputFile Name = amit.txt File Name = peter.txt File Name = result.html File Name = demo.java File Name = settings.ini