Programming PHP

implode
string implode(array strings, string separator)
Returns a string created by joining every element in strings with separator.
import_request_variables
bool import_request_variables(string types[, string prefix])
Imports GET, POST, and cookie variables into the global scope. The types parameter
defines which variables are imported, and in which order—the three types are "g" or "G",
"p" or "P", and "c" or "C". For example, to import POST and cookie variables, with cookie
variables overwriting POST variables, types would be "cp". If given, the variable names are
prefixed with prefix. Ifprefix is not specified or is an empty string, a notice-level error is
sent due to the possible security hazard.
in_array
bool in_array(mixed value, array array[, bool strict])
Returns true if the given value exists in the array. If the third argument is provided and is
true, the function will return true only if the element exists in the array and has the same
type as the provided value (that is, "1.23" in the array will not match 1.23 as the argument).
If the argument is not found in the array, the function returns false.
ini_alter
string ini_alter(string variable, string value)
This function is an alias for ini_set( ).
ini_get
string ini_get(string variable)
Returns the value for the configuration option variable. Ifvariable does not exist, returns
false.
ini_restore
string ini_restore(string variable)
Restores the value for the configuration option variable. This is done automatically when a
script completes execution for all configuration options set using ini_set( ) during the
script.
414 | Appendix A: Function Reference
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