<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Data Filtering</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.ctype-xdigit.html">ctype_xdigit</a></div> <div class="next" style="text-align: right; float: right;"><a href="intro.filter.html">Introduction</a></div> <div class="up"><a href="refs.basic.vartype.html">Variable and Type Related Extensions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="book.filter" class="book"> <h1 class="title">Data Filtering</h1> <ul class="chunklist chunklist_book"><li><a href="intro.filter.html">Introduction</a></li><li><a href="filter.setup.html">Installing/Configuring</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="filter.requirements.html">Requirements</a></li><li><a href="filter.installation.html">Installation</a></li><li><a href="filter.configuration.html">Runtime Configuration</a></li><li><a href="filter.resources.html">Resource Types</a></li></ul></li><li><a href="filter.filters.html">Types of filters</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="filter.filters.validate.html">Validate filters</a></li><li><a href="filter.filters.sanitize.html">Sanitize filters</a></li><li><a href="filter.filters.misc.html">Other filters</a></li><li><a href="filter.filters.flags.html">Filter flags</a></li></ul></li><li><a href="filter.constants.html">Predefined Constants</a></li><li><a href="filter.examples.html">Examples</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="filter.examples.validation.html">Validation</a></li><li><a href="filter.examples.sanitization.html">Sanitization</a></li></ul></li><li><a href="ref.filter.html">Filter Functions</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="function.filter-has-var.html">filter_has_var</a> — Checks if variable of specified type exists</li><li><a href="function.filter-id.html">filter_id</a> — Returns the filter ID belonging to a named filter</li><li><a href="function.filter-input-array.html">filter_input_array</a> — Gets external variables and optionally filters them</li><li><a href="function.filter-input.html">filter_input</a> — Gets a specific external variable by name and optionally filters it</li><li><a href="function.filter-list.html">filter_list</a> — Returns a list of all supported filters</li><li><a href="function.filter-var-array.html">filter_var_array</a> — Gets multiple variables and optionally filters them</li><li><a href="function.filter-var.html">filter_var</a> — Filters a variable with a specified filter</li></ul></li></ul></div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.ctype-xdigit.html">ctype_xdigit</a></div> <div class="next" style="text-align: right; float: right;"><a href="intro.filter.html">Introduction</a></div> <div class="up"><a href="refs.basic.vartype.html">Variable and Type Related Extensions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>
