str-starts-with.xml

<?xml version="1.0" encoding="utf-8"?>
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<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.str-starts-with">
 <refnamediv>
  <refname>str_starts_with</refname>
  <refpurpose>文字列が指定された部分文字列で始まるかを調べる</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>str_starts_with</methodname>
   <methodparam><type>string</type><parameter>haystack</parameter></methodparam>
   <methodparam><type>string</type><parameter>needle</parameter></methodparam>
  </methodsynopsis>
  <para>
   <parameter>haystack</parameter> 
   が <parameter>needle</parameter> で始まるかを調べます。
   大文字小文字は区別されます。
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>haystack</parameter></term>
     <listitem>
      <para>
       検索対象の文字列
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>needle</parameter></term>
     <listitem>
      <para>
       <parameter>haystack</parameter> で調べる部分文字列
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   <parameter>haystack</parameter> が
   <parameter>needle</parameter> で始まる場合、
   &true; を返します。そうでない場合、&false; を返します。
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>空文字列 <literal>''</literal> を使う場合</title>
    <programlisting role="php">
<![CDATA[
<?php
if (str_starts_with('abc', '')) {
    echo "All strings start with the empty string";
}
?>
]]>
    </programlisting>
    &example.outputs;
    <screen role="php">
<![CDATA[
All strings start with the empty string
]]>
    </screen>
   </example>

   <example>
    <title>大文字小文字の区別</title>
    <programlisting role="php">
<![CDATA[
<?php
$string = 'The lazy fox jumped over the fence';

if (str_starts_with($string, 'The')) {
    echo "The string starts with 'The'\n";
}

if (str_starts_with($string, 'the')) {
    echo 'The string starts with "the"';
} else {
    echo '"the" was not found because the case does not match';
}

?>
]]>
    </programlisting>
    &example.outputs;
    <screen role="php">
<![CDATA[
The string starts with 'The'
"the" was not found because the case does not match
]]>
    </screen>
   </example>
  </para>
 </refsect1>

 <refsect1 role="notes">
  &reftitle.notes;
  &note.bin-safe;
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>str_contains</function></member>
    <member><function>str_ends_with</function></member>
    <member><function>stripos</function></member>
    <member><function>strrpos</function></member>
    <member><function>strripos</function></member>
    <member><function>strstr</function></member>
    <member><function>strpbrk</function></member>
    <member><function>substr</function></member>
    <member><function>preg_match</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>

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